Shallow vs Deep Frying Donuts: The 325–375°F Rule for Home Cooks
Deep frying gives the crispiest, least greasy donut because full immersion cooks both sides at once and seals the crust fast. Shallow frying uses far less oil and suits small batches, thin or drop donuts, and anyone without a deep pot. Pick deep frying for texture and consistency; pick shallow frying for a lighter setup and easier cleanup.
TL;DR:
- At 163 to 190°C, fried food typically absorbs 8% to 25% oil; cooler oil lets dough absorb more fat before its crust forms.
- For shallow frying, use 6 to 20 millimeters of oil and flip each donut; deep frying needs 7 to 10 centimeters for free floating.
- Fry only three to four donuts at a time, then let the oil return to its target temperature for 30 to 60 seconds between batches.
- Properly hydrated, rested dough fries evenly either way, while rushed or overmixed dough can turn greasy and dense despite temperature control.
- Keep water away from hot oil, never leave it unattended, and smother an oil fire with a metal lid or use a Class K extinguisher.
Table of Contents
- How shallow frying and deep frying differ
- Step by step: equipment, oil and timing for each method
- Safety essentials and oil care for home frying
- Our take on frying method as a baker
- Try both methods with our Cook Islands donut baking mix
- FAQ
- Sources
How shallow frying and deep frying differ
Shallow frying partly submerges the donut: the dough sits in a few millimetres of oil and needs flipping so each side gets contact and colour. Deep frying fully immerses the donut, so it cooks on all sides without turning, which is why doughnut shops rely on it for even colour and lift.
Temperature decides almost everything else. Oklahoma State University sets the proper deep frying range at 163 to 190°C (325 to 375°F) and notes that food fried at the correct temperature absorbs roughly 8 to 25% oil, while cooler oil lets dough soak up more fat before a crust forms. That crust effect, sometimes called case hardening, happens when hot oil instantly seals the surface and locks moisture in, which also limits how much oil gets in. Shallow frying can reach the same crust if the oil is hot enough, but the flipping motion and partial contact make it harder to seal every side at once.
The practical differences show up quickly once you’re at the stove:
- Deep frying uses more oil overall but produces a more even, less greasy crust when temperature is held steady.
- Shallow frying uses a fraction of the oil and is easier to clean up, since there’s no large pot of oil to store or filter.
- Deep frying needs less hands-on attention once the donuts are floating, while shallow frying demands a flip at the right moment on every side.
- Both methods take roughly the same time per batch, typically a few minutes total, once the oil is at temperature.
Texture tells the real story. Deep fried donuts tend to puff more evenly and finish with a drier, crisper shell. Shallow fried donuts can turn out slightly denser or chewier at the edges where oil contact was less complete, though a well timed flip narrows that gap considerably.
Step by step: equipment, oil and timing for each method
Start with a neutral oil that can handle sustained heat without breaking down too fast. Canola, vegetable, and peanut oil (when there’s no allergy concern) are common choices. America’s Test Kitchen found that vegetable shortening gave less greasy results than liquid oil for buttermilk donuts, which is worth knowing if you’re frying ahead or storing donuts rather than eating them straight away.
Whichever oil you choose, the target range stays the same. The Institute of Culinary Education recommends holding oil at 360 to 375°F (182 to 190°C) and using a thermometer rather than guessing, since a few degrees either way changes how the dough browns and how much oil it takes on.
Oil depth depends on the method. For shallow frying, aim for about 6 to 20 millimetres (a quarter to three quarters of an inch) so the donut sits in oil without being fully covered. For deep frying, add enough oil that the donut floats freely with room to turn on its own, usually a good 7 to 10 centimetres in a heavy pot.
The process itself follows the same basic order for either method:
- Heat the oil to your target range and check it with a thermometer before adding anything.
- Prepare the dough following your mix instructions, such as the steps in our Cook Islands donut baking mix guide.
- Test the oil with a small piece of dough; it should sizzle and rise within seconds.
- Fry in small batches, around three to four donuts at a time, leaving space between each one.
- Drain on a wire rack rather than paper towel to keep the crust crisp.
- Glaze or sugar once the donuts have cooled slightly so the coating sets rather than melts off.
Epicurious points out that oil temperature drops the moment food goes in, and adding too many donuts at once stops it recovering in time, which leads to pale, greasy results. A heavy pot such as a Dutch oven holds heat better than a thin skillet, so it recovers between batches faster and gives more consistent colour from the first donut to the last.
Pro Tip: Let the oil climb back to your target temperature for a full 30 to 60 seconds between batches before adding the next round of donuts.
Safety essentials and oil care for home frying
Hot oil is unforgiving, so a few habits make frying at home far less risky. Keep the frying area dry, since water hitting hot oil causes violent spatter, and never add wet or icy ingredients straight from the fridge without patting them dry first. Use a thermometer rather than judging by eye, don’t overcrowd the pot, and keep children and pets well clear of the stove while oil is heating. The NPS deep frying safety guidance warns against leaving oil unattended and recommends checking oil levels stay within safe limits for your pot or fryer.
If oil catches fire, smother the flames with a metal lid or use a Class K extinguisher designed for cooking oil fires; never use water.
A few pieces of equipment make the whole job easier:
- A deep fry or candy thermometer to track temperature without guessing.
- A spider or slotted skimmer to lift donuts out cleanly.
- A wire rack for draining so the crust stays crisp rather than soggy.
- A heavy pot with high sides and heat resistant tongs for safe handling.
Filter used oil through a fine strainer once it cools, and discard it once it smells off, turns dark, or starts smoking at a lower temperature than before. Pour cooled oil into a sealed container for disposal rather than down the sink. For shallow frying specifically, a splatter guard over the pan and a shallower oil depth cut down on mess, and patting dough dry before it hits the oil reduces spitting.
Our take on frying method as a baker
Most home bakers overthink the choice between shallow and deep frying when the dough itself matters more than the method. A well hydrated, properly rested dough fries evenly in either setup, while a rushed or overmixed batch turns greasy and dense no matter how precisely the oil is heated. We’ve found that the temperature discipline covered above, more than the pot you use, decides whether a batch turns out light or leaden.
For troubleshooting specific batches, our best oil for frying donuts guide and our cinnamon sugar donut recipe walk through both frying variants with the timing adjustments each one needs.
— Jasmin
Try both methods with our Cook Islands donut baking mix
Our Cook Islands Donut Baking Mix needs only water and oil, so switching between shallow frying and deep frying is a matter of oil depth, not a different recipe. The same mix works for a quick shallow fried batch or a full deep fried tray for a gathering.
- The 250g mix suits a smaller household batch or a first attempt at either frying method.
- The 650g mix stretches further for events, gatherings, or doubled recipes.
- Both sizes work equally well for donuts, and the same base mix adapts to Māori fried bread, panekeke, and coconut rolls.
If you’d rather skip the oil altogether on some days, our air fryer donut guide shows how the same mix adapts to that method too.
FAQ
Do donuts get deep fried?
Most traditional donuts are deep fried because full immersion cooks both sides evenly without flipping and produces the classic puffed shape. Some recipes shallow fry thinner or drop style donuts, and others bake or air fry as alternatives.
What is the main difference between shallow frying and deep frying?
Deep frying fully submerges food in oil so it cooks on all sides at once, while shallow frying uses a shallow layer of oil and needs flipping to cook each side. Oklahoma State University notes deep frying at 163 to 190°C typically results in 8 to 25% oil absorption when temperature is controlled properly.
What oil does Krispy Kreme use to fry their donuts?
We don’t have a publicly listed answer for that specific detail. For home frying, neutral oils such as canola, vegetable, or peanut oil at 360 to 375°F work well, as recommended by the Institute of Culinary Education.
Can you provide a recipe for donut batter?
Our Cook Islands Donut Baking Mix only needs water and oil added, with full mixing and frying steps in our doughnut baking mix guide. It’s designed to produce soft, authentic island style donuts without a separate from-scratch batter recipe.
Sources
- Deep fat frying basics for food services | Oklahoma State University
- Institute of Culinary Education (frying guidance)
- Sugared buttermilk doughnuts | America’s Test Kitchen
- How to deep‑fry like a pro | Epicurious
- Deep fat frying and food safety (NPS guidance)
