The Ultimate Guide to Choosing the Right Donut Frying Oil
Smoke points, fat types, flavor profiles & what the biggest chains actually use
The dough recipe gets all the credit. The oil gets none — until it's wrong. Then every operator notices: donuts coming out greasy instead of golden, darker than they should be, with an aftertaste that no amount of glaze can cover. Or oil that burns through in two days of service instead of five, quietly destroying margins no one can easily trace back to the fryer.
The right donut frying oil is not a minor operational detail. It is one of the most consequential decisions a donut shop makes — affecting product quality, food cost, oil longevity, customer perception, and health compliance all at once. The right oil performs three key jobs perfectly: it transfers heat efficiently, it doesn't burn, and it stays out of the way of the donut's flavor.
This guide covers everything you need to make the right choice for your specific operation — from the science of smoke points and fat behavior, to a ranked comparison of every major donut frying oil, to what Krispy Kreme and Dunkin' actually use in their fryers.
Step 1: Know Your Donut Type — It Changes Everything
Before you choose an oil, you need to know what you're frying. Yeast-raised donuts and cake donuts behave completely differently in the fryer — and they respond differently to the fat they're cooked in.
🍩 Yeast-Raised Donuts
Light, airy, and leavened by yeast fermentation. They fry quickly at 365–375°F and absorb oil readily — which means the fat type has a strong influence on final texture. Yeast donuts fried in solid shortening or lard acquire an especially crisp skin and savory depth that liquid oils can't fully replicate.
Best oils: Solid shortening, palm oil, lard, canola
Frying temp: 365–375°F | Time: 60–90 seconds per side
🎂 Cake Donuts
Denser, chemically leavened (baking powder/soda), and more structurally forgiving in the fryer. They fry slightly slower and hold up better to liquid oils. Canola worked equally well for cake, yeast, and extruded donuts such as crullers in SAVEUR's professional test kitchen trials.
Best oils: Canola, cottonseed, vegetable shortening
Frying temp: 370–380°F | Time: 90–125 seconds per side
The 3 Non-Negotiable Criteria for Donut Frying Oil
Every oil decision in a donut shop should be evaluated against three criteria. No other factors matter until these are satisfied.
1. Smoke Point — The Safety Floor
The smoke point is the temperature at which oil stops shimmering and starts smoking — breaking down and releasing a foul, acrid smell and taste. Donut frying requires maintaining 365–375°F consistently across a full service. Your oil's smoke point needs to sit comfortably above this — ideally at 400°F or higher — to give you a buffer against temperature spikes and equipment variation. An oil that approaches its smoke point at frying temperature will produce bitter, burnt-tasting donuts and degrade rapidly between batches.
2. Flavor Neutrality — The Silent Partner Rule
The ideal donut oil is neutral in flavor — acting as a silent partner in the cooking process. Your customers are tasting vanilla, nutmeg, buttermilk, and sugar. They should not be tasting the oil. Strongly flavored oils — unrefined coconut, extra virgin olive, unrefined sesame — will compete with and overpower the delicate flavor profile of any donut. A faintly nutty note from peanut oil is acceptable and even complementary. Anything stronger is a problem.
3. Cost Efficiency & Longevity — The Margin Factor
In a commercial donut operation, frying oil is one of the largest controllable cost variables on the P&L. Oil stability — meaning how well it resists oxidation and polymerization during multiple frying batches — is especially important in commercial settings where cost efficiency is critical. An oil that degrades in two days costs more per donut than a more stable oil that holds for five days at the same quality level, even if the per-gallon price is lower. Stability and longevity are as important as purchase price.
The 6 Best Oils for Frying Donuts — Ranked
Vegetable Shortening
🏆 Best Overall for Commercial Donut ProductionVegetable shortening is the oil of choice for many donut chains, including Krispy Kreme — ideal for all donut types due to its versatility, neutral flavor, and cost-effectiveness. Its higher melting point means donuts absorb significantly less oil during frying, producing a less greasy product with a firmer, more tender crumb. SAVEUR's test kitchen found that solid fats rose to temperature and rebounded between batches faster than any liquid oil — a critical advantage in high-volume donut production where temperature consistency directly affects product quality batch to batch. Use frying-specific shortening, not baking shortening — the smoke points differ significantly.
Palm Oil
🏭 The Commercial Chain StandardDunkin' Donuts uses palm oil to fry all of their donuts because it remains solid at room temperature — meaning that once donuts cool, they carry a glossy sheen rather than a greasy surface. Krispy Kreme also fries in palm oil, specifically to achieve a trans-fat-free product. Palm oil's extremely high smoke point of approximately 455°F gives it the widest safety buffer of any commercial donut frying fat — and its exceptional stability allows for high-volume reuse without rapid quality degradation. The primary consideration for operators is sourcing: sustainable, deforestation-free palm oil is now the industry standard and the only variant that carries no reputational risk.
Canola Oil
✅ Best for Independent Shops — All-Around PerformanceThe best all-around oil for frying donuts is canola oil — because of its high smoke point, completely neutral flavor, and excellent value. It consistently produces light, fluffy, non-greasy donuts without adding any unwanted taste. SAVEUR's test kitchen used canola as their go-to oil for its neutral flavor, good value, and high smoke point — and found it worked equally well for cake, yeast, and extruded donuts including crullers. For independent donut shops that can't access commercial shortening in bulk quantities, canola is the most reliable, consistent, and cost-efficient choice available at any supply level.
Cottonseed Oil
🔬 The Underrated Chain SecretMany large-scale donut chains use cottonseed oil, or a blend containing it — the unsung hero of the commercial frying world. It's incredibly stable, neutral, and cost-effective when purchased in bulk. Cottonseed oil is the preferred choice for frying beignets — a classic French donut — and its high smoke point and neutral flavor make it equally effective for all other donut types. Its exceptional stability means it can be reused multiple times without sacrificing quality, making the per-donut cost significantly lower than the purchase price alone suggests. The main limitation is availability in smaller non-commercial quantities.
Refined Peanut Oil
🥜 Premium Option — Flavor-Forward ShopsRefined peanut oil's mildly nutty flavor is versatile enough for all types of donuts — and works particularly well for donuts coated with crushed nuts or glazed with peanut butter, as the subtle taste complements these flavors. SAVEUR found peanut oil imparted the darkest color of the oils tested, giving donuts a slightly nutty taste they found complementary to the sweetness. The peanut allergen consideration is significant in commercial settings — Krispy Kreme specifically avoids peanut oil due to severe peanut allergy risk among customers. If your operation serves a menu with other nut items, this is a practical choice. If you're allergen-conscious, it's a risk to weigh carefully.
Lard (Traditional Animal Fat)
🐷 Best Flavor — Traditional & Artisan ShopsYeast-raised donuts fried in lard acquire a savory flavor depth that no vegetable oil can fully replicate. Lard is the traditional donut frying fat — used for generations before vegetable shortening became the commercial standard — and it is experiencing a notable revival in artisan donut shops positioning around craft, nostalgia, and flavor authenticity. Its smoke point of ~370°F sits close to the frying zone, which means less margin for temperature error than higher-smoke-point oils. Lard is not suitable for kosher, halal, or vegan operations, and requires clear menu communication for customers with dietary restrictions. For a traditional donut shop built around flavor differentiation, it is a compelling and increasingly marketable choice.
What the Biggest Donut Chains Actually Use
Krispy Kreme
Palm oil blend (vegetable shortening including palm, soybean, cottonseed and/or canola). Trans-fat free. No peanut oil used due to allergen policy.
Dunkin'
Palm oil — specifically chosen because it remains semi-solid at room temperature, giving donuts a glossy finish rather than a greasy surface after cooling.
Beignet Shops
Cottonseed oil — the traditional choice for classic French donuts, prized for its neutral flavor, high smoke point, and stability under continuous high-volume frying.
Independent Shops
Typically canola or a donut-specific frying shortening blend. Canola is the most accessible high-performance option at independent supply volumes.
Artisan / Craft Shops
Increasingly lard or high-quality animal fat blends — positioned as a flavor and authenticity differentiator in the growing premium donut segment.
Health-Positioned Shops
High-oleic canola or avocado oil — offering maximum stability with a health-forward story that resonates with wellness-conscious donut customers.
The Temperature Guide: Getting It Right Every Batch
🌡️ Donut Fryer Temperature — What Happens at Each Range
Sources: Flavor365 Definitive Donut Frying Guide | Tasting Table | SAVEUR Test Kitchen | WebstaurantStore Commercial Donut Operations Guide
Oils to Avoid in a Donut Fryer
❌ Extra Virgin Olive Oil
Low smoke point (325–375°F) and a rich, vegetal flavor that will compete aggressively with any glaze or topping. It will start burning at donut frying temperatures.
❌ Unrefined Coconut Oil
Smoke point of ~350°F is at the low end for donut frying and its strong coconut flavor will overpower the donut entirely. Refined coconut oil is safer but expensive.
❌ Butter
Smoke point of ~302°F makes it completely unsuitable for deep frying — it will burn long before reaching donut frying temperature, producing acrid, bitter flavors and significant smoke.
❌ Unrefined Sesame Oil
Strong, distinctive flavor that has no place near the neutral, sweet flavor profile of a donut. Even at small volumes, the sesame character will penetrate the exterior and transfer throughout the crumb.
❌ Baking Shortening
Baking shortening has a much lower smoke point than frying-specific shortening — a critical distinction. Always confirm you're purchasing frying shortening before using it in a commercial donut fryer.
❌ Flaxseed or Walnut Oil
Both have very low smoke points and extremely strong, distinctive flavors. They are finishing oils designed for cold applications — they will degrade almost instantly at donut frying temperatures.
How to Make Your Donut Frying Oil Last Longer
Choosing the right oil is only half the equation. How you manage that oil once it's in the fryer determines how long it performs, how consistently your donuts taste, and how much your weekly oil cost actually is.
Maintaining clean, properly heated oil improves not only flavor but also shelf life and appearance. Donut frying is one of the most demanding applications for oil longevity — the sugar in the dough caramelizes and deposits into the oil, the moisture from the dough drives hydrolysis, and the high-volume continuous frying cycle accelerates oxidation and thermal degradation simultaneously. Without active oil management, even the best donut frying oil will degrade in 2–3 days of service.
The operational levers that extend oil life in a donut operation are:
- Filter daily — remove the sugar residue, carbonized debris, and particles that accumulate from donut production. Donut-specific residue, particularly caramelized sugar deposits, catalyze oxidation faster than standard breaded food debris
- Use filter powder nightly — to remove the invisible chemical degradation compounds (free fatty acids, polar compounds) that paper filtration alone cannot catch
- Never season food over the fryer — stray sugar, salt, or powdered toppings falling into oil are pro-oxidants that accelerate degradation
- Cover fryers during downtime — reducing air exposure slows oxidation between morning and afternoon service
- Reduce temperature during slow periods — dropping to 250°F during a 2-hour midday lull meaningfully reduces thermal degradation hours
- Use a TPM meter — to know objectively when oil is approaching the 25% polar compound discard threshold rather than guessing from color alone
🔬 How Purimax Protects Your Donut Frying Oil
Donut frying is harder on oil than almost any other application. The caramelized sugar deposits, high moisture content of the dough, continuous frying volume, and powdered sugar or glaze debris all accelerate oil degradation at an above-average rate. Purimax filter powder is specifically designed to address the invisible chemical side of this degradation — the free fatty acids and polar compounds that paper filtration never touches.
Add Purimax to your hot fryer at the end of every service. Run the automatic 2-minute circulation. The powder binds to and removes the degradation compounds from throughout the oil volume. Before-and-after TPM readings confirm the reduction. Your oil starts tomorrow's donut production from a meaningfully better chemical baseline — consistently, every night, in under 5 minutes.
View full instructions for automatic and manual fryer systems →
You've Chosen the Right Oil. Now Make It Last.
The right donut frying oil is a major decision — but it only matters if you manage it properly once it's in the fryer. Purimax removes the invisible degradation compounds that build up with every donut batch, resetting your oil nightly and extending its usable life by up to 250%.
Up to 250% Longer frying oil life with the nightly Purimax filtration routine- Works with all commercial donut frying fats — shortening, palm, canola, cottonseed
- Pour into hot fryer at end of service — 2-minute automatic circulation cycle
- Removes free fatty acids and polar compounds paper filtration misses
- TPM meter readings confirm the reduction after every single treatment
- No draining, no waiting, no lengthy process — done in under 5 minutes
- Risk-free trial available — see the results in your own fryers
Frequently Asked Questions
What is the best oil for frying donuts commercially?
For most commercial donut operations, the best choice is a donut-specific frying shortening or palm oil — both used by the industry's largest chains including Krispy Kreme and Dunkin'. Vegetable shortening is ideal for all donut types due to its versatility, neutral flavor, and cost-effectiveness, while palm oil's exceptionally high smoke point and solid-at-room-temperature properties give donut surfaces a glossy, non-greasy finish after cooling. For independent shops without access to commercial-scale bulk supply, canola oil is the strongest all-around performer at any volume.
What oil does Krispy Kreme use?
Krispy Kreme fries their donuts in palm oil, specifically to achieve a trans-fat-free product. Their fryer oil is a vegetable shortening blend that can include palm, soybean, cottonseed, and/or canola oil. Krispy Kreme does not use peanut oil due to the severe peanut allergy risk among their customer base.
What oil does Dunkin' use to fry donuts?
Dunkin' Donuts uses palm oil to fry all of their donuts. Palm oil is specifically chosen for this application because it remains semi-solid at room temperature — meaning that cooled donuts carry a neat, glossy sheen rather than a pooling layer of liquid oil on their surface. Palm oil's high smoke point of approximately 455°F also makes it one of the most stable frying fats available at commercial volume.
Is lard better than shortening for frying donuts?
For flavor: yes. Yeast-raised donuts fried in lard acquire a savory flavor depth and especially crisp skin that solid vegetable shortening cannot fully match. For commercial practicality: shortening wins. Lard has a lower smoke point (~370°F), a shorter shelf life, dietary restrictions that affect a meaningful portion of your customer base, and higher cost at commercial volumes. Artisan donut shops differentiating on flavor and craft authenticity should seriously consider lard. High-volume commercial operations should stick with shortening or palm oil.
How often should a donut shop change its frying oil?
Without active oil management, donut shop frying oil typically needs changing every 2–4 days due to the high sugar and moisture load from continuous donut frying. With consistent daily filtration using filter paper and a professional filter powder like Purimax, this can be extended to 5–7+ days without sacrificing product quality. The most accurate way to determine change timing is with a TPM meter — old or broken-down oil causes donuts to taste rancid or smell burnt, and no amount of sugar or glaze will cover degraded oil flavor once it becomes noticeable.
Sources & Further Reading
- WebstaurantStore — The Best Oil to Fry Donuts (Commercial Guide)
- Flavor365 — The Definitive Guide to Choosing the Best Donut Frying Oil (August 2025)
- SAVEUR Test Kitchen — Five Oils for Frying: Donut Edition
- Tasting Table — The Best Type of Oil to Use When Frying Donuts (February 2024)
- Donut Supplies — Types of Oil or Shortening for Frying Donuts: Advantages & Disadvantages
- Donut Info — Choosing the Best Oil for Frying Donuts (April 2025)
- FryAway — The 7 Best Oils for Frying Donuts for Bakery-Perfect Results (January 2026)
- Emily Laurae — Best Oil for Frying Donuts (Updated April 2025)
- Krispy Kreme Interesting Facts — Confirmed Frying Oil: Palm Oil (Trans-Fat Free)
- Go Dairy Free — Krispy Kreme Dairy-Free & Vegan Menu Guide: Fryer Oil Note (Updated January 2026)
- Purimax — Filtration Instructions: Automatic & Manual Systems
- Purimax — Filter Powder Trial Period
