When the term "Air Fryer" is mentioned, the first things that usually come to mind are golden-yellow french fries, crispy-on-the-outside, juicy-on-the-inside chicken wings, or conveniently reheated frozen foods. However, due to their fundamental operating principles, these ingenious kitchen gadgets are actually ultra-powerful, miniature convection ovens. Therefore, theoretically, almost anything you can bake in a giant conventional oven can also be baked in an air fryer. This certainly includes fluffy cakes, delicious muffins, soft bread rolls, and flaky pastries!
The problem arises when dealing with dough-based goods (referred to as "pastry" in culinary terms). The air fryer's beloved, fierce hot air circulation—the very thing that rapidly crisps foods—suddenly becomes our worst enemy. If you apply the exact time and temperature from a standard oven recipe, or if you crudely apply the conversion rules meant for meat to your cake, you will most likely end up with a charred, blackened exterior while the inside remains a runny, raw batter.
So, what is the formula for baking pastries without drying them out, burning the outside, and ensuring the inside reaches that perfect, spongy consistency? We are diving deep into the scientific details of the "Pastry (18%) Rule," a critical component precision-engineered into the background calculation algorithm of our free Air Fryer to Conventional Oven Time & Temp Converter.
Why Do Pastries Require a Different, Gentler Heat?
When cooking chicken or potatoes, our primary culinary objective is to sear the outer surface as quickly as possible, locking the moisture inside and creating that famous crispy exterior. However, the chemical process works entirely differently in voluminous dough-based baked goods like cakes, buns, or breads. For the baking powder or active yeast within the dough to release gas and cause the dough to rise, the heat must travel toward the center of the dough very slowly, steadily, and homogeneously.
The air fryer operates on the exact opposite principle; it blasts heat directly and aggressively onto the food using a powerful fan. This intense heat strikes the surface so rapidly that the outer crust of the cake cooks instantly, forming a hard, impenetrable shell. Once the outer crust hardens prematurely, the wet interior cannot breathe or find room to expand. By the time the heat finally reaches the center to cook it, the already-hardened exterior has begun to char and burn. To turn this physical reality to our advantage, we must alter the time/temperature math of the recipe to suit the chemistry of the dough.
The Pastry Adaptation Rule: Lower Heat, More Forgiving Time Reduction
The classic "golden rule" we apply when making standard meat or potatoes in an air fryer is to always drop the oven temperature by 20°C (or about 35°F) and reduce the total cooking time by 22% to 28%. However, when it comes to "pastry," cutting the time this drastically results in the aforementioned "cooked outside, raw inside" disaster.
In baked goods, we need heat to penetrate the center, which requires time closer to what an oven provides. Therefore, our special formula for pastries is updated as follows:
- Lower the Temperature (The -20°C Rule Remains Constant): Just as we apply to meat and potatoes, you must drop the temperature specified in the oven recipe by 20°C (35°F). Because high heat will immediately burn the outer crust, this rule is far more critical for pastries than for any other food. If the recipe calls for 180°C, you must absolutely drop it to 160°C.
- Reduce the Time Less (The Special 18% Rule): Here is the life-saving difference. Instead of cutting the oven time by the standard 22% or 25%, as utilized in our calculator, you should only reduce the time for pastries by 18%. This fine-tuning grants your cake that extra, critical 2-3 minutes of flexibility needed for the inside to steep and bake slowly without the outside burning.
Explaining with an Example: A Delicious Muffin Recipe
You have a recipe for wonderful, fluffy oven muffins, and the recipe card says exactly this: Bake in a preheated oven at 180°C for exactly 25 minutes.
If you applied this recipe to the air fryer using a standard food rule (treating it like meat), the time would be reduced by 22-25%, meaning you'd probably stop the machine around the 19th or 20th minute. When you opened the lid, the tops of the muffins would look fantastic, but at the first bite or knife slice, gooey, raw batter would ooze out.
Instead, let's apply our special "Pastry Rule" (only an 18% time drop):
- Target Temp: 180°C (Oven heat) - 20°C = 160°C in the Air Fryer
- Target Time: We reduce the 25 minutes by 18%.
25 * (1 - 0.18) = 20.5 minutes. To guarantee success and stay on the safe side, we set the time to 21 minutes.
The result? As you can see, we lowered the temperature so it wouldn't be aggressive, but we didn't cut the time drastically. Those muffins baking at 160°C for 21 minutes will never burn on the outside, and the inside will be as soft as a sponge and perfectly baked throughout.
3 Golden Tips When Baking Pastries in an Air Fryer
While mathematical formulas form the theoretical foundation, you also need to overcome some physical challenges arising from the air fryer's structure and airflow using practical kitchen tricks.
1. If the Top Browns Too Quickly, Use Aluminum Foil Immediately:
If you are baking a cake or pie and there is still a lot of time left (e.g., 10 minutes remaining), but the top has already reached your desired darkness, immediately pause and open the basket. Without letting it touch the food directly, cover the mouth of the basket with a suitably sized piece of aluminum foil. The foil will block the direct, drying heat coming from the top element, buying time for the inside of the cake to bake slowly using just the ambient temperature. However, ensure the foil is secured well at the edges so it doesn't fly up and stick directly to the heating element!
2. The Color and Material of the Baking Pan Are Crucial:
Dark-colored (especially matte black) metal pans thermodynamically draw and absorb heat very rapidly. When the air fryer is already heating aggressively, using a black pan can cause the edges of the cake to dry out and burn almost immediately. Light-colored (grey) silicone molds, light aluminum, or thick glass (like Pyrex) transmit heat to the dough much more gently and slowly. Therefore, when baking in an air fryer, these types of pans are much safer and more professional choices.
3. The Classic "Shake Basket" Rule Does Not Apply Here:
When cooking chicken, meat, or potatoes, pulling the basket out halfway and shaking it is essential for even cooking. However, pulling out the basket and shaking it vigorously while a liquid cake batter or muffin is baking will cause all the air inside the batter to deflate or ruin its shape. Absolutely avoid unnecessarily opening and closing the device and letting cold air rush in when making pastries. Only check quickly towards the very end of the time to do a toothpick test.
If you are currently in the kitchen, your hands are covered in flour, and you don't want to deal with these confusing percentage calculations or formulas, your job is very easy. Simply open our Air Fryer and Oven Converter tool on your smartphone. Select "Baking / Pastries / Cakes" as the food category. The tool will automatically and flawlessly apply this vital 18% rule in the background, instantly telling you the most ideal time and temperature. Enjoy your baking!
