Craving the nostalgic comfort of cinnamon sugar donuts but want to keep it keto? These Air Fryer Cinnamon Sugar Donuts deliver all the classic flavour and pillowy softness you love—without the carbs or guilt. Made with almond flour and sweetened naturally, they’re perfect for a quick breakfast treat, a satisfying afternoon snack, or a healthier dessert option.
Using the air fryer means you get that golden, slightly crisp exterior with a tender, moist crumb inside—no deep frying or messy oil required. The cinnamon ‘sugar’ coating is made with erythritol, giving you the same sweet, warming finish as traditional donuts.
Ready in under 30 minutes and requiring just a handful of ingredients, these donuts are simple enough for weekday mornings but special enough for weekend brunch. You’ll mix, shape, air fry, and coat—then enjoy warm, fragrant donuts that fit perfectly into your keto lifestyle.
At a glance
- Time: 25 minutes
- Difficulty: Easy
- Servings: 6
- Cost: Affordable
Macros (per serving)
- Protein: 6 g
- Fat: 13 g
- Carbs: 3 g
- Energy: 155 kcal
Ingredients
- 120g Almond flour (Finely ground for best texture)
- 2 large Eggs (Room temperature)
- 50g + 20g Erythritol (Divided; for batter and coating)
- 1 tsp Baking powder
- 2 tsp Ground cinnamon (Divided; for batter and coating)
- 40g Butter (Melted, plus extra for brushing)
- 1 tsp Vanilla extract
- Pinch Salt
Equipment Needed
- Air fryer
- Mixing bowl
- Whisk
- Silicone donut moulds
- Pastry brush
- Measuring spoons
Steps
- Preheat your air fryer to 170°C. Lightly grease silicone donut moulds with melted butter.
- In a mixing bowl, whisk together almond flour, 50g erythritol, baking powder, 1 tsp cinnamon, and a pinch of salt.
- In a separate bowl, beat eggs, melted butter, and vanilla extract until smooth.
- Combine wet and dry ingredients, mixing until a thick, smooth batter forms.
- Spoon or pipe the batter evenly into the donut moulds, smoothing the tops.
- Place moulds in the air fryer basket. Air fry for 8–10 minutes until donuts are golden and spring back when pressed.
- Let donuts cool in the moulds for 5 minutes, then gently remove and place on a rack.
- Mix remaining erythritol (20g) with 1 tsp cinnamon in a shallow bowl.
- Brush warm donuts lightly with melted butter, then roll in the cinnamon 'sugar' mixture to coat.
- Serve warm or at room temperature. Enjoy the soft, sweet, cinnamon-kissed treat!
Allergens & Swaps
Allergens:
Recipe contains: eggs, nuts, dairy
Potential swaps:
- Butter → Coconut oil — For a dairy-free version
- Almond flour → Sunflower seed flour — Nut-free alternative; texture may vary
- Erythritol → Monk fruit sweetener — Use same amount; adjust to taste
Serving Ideas
- With black coffee – The warmth and slight bitterness of coffee pairs perfectly with the sweet, spiced donut.
- With whipped cream – Adds a creamy, indulgent touch for dessert.
- With fresh berries – For a refreshing, colourful breakfast plate.
Additional Info
Chefs Tips
- For extra fluffiness, let the batter rest for 5 minutes before shaping.
- Don’t overbake—remove donuts as soon as they spring back to touch.
- Brush donuts with butter while still warm for best cinnamon sugar adhesion.
Variations
- Add a pinch of nutmeg to the batter for a bakery-style flavour.
- Dip in melted dark chocolate for a richer treat.
- Top with a keto cream cheese glaze instead of cinnamon sugar.
Troubleshooting
- If donuts stick to the mould, let them cool longer before removing.
- If the batter is too thick, add 1–2 tsp almond milk to loosen.
- If donuts are too dry, reduce air fryer time by 1–2 minutes.
Storage & Reheating
Keep donuts in an airtight container at room temperature for up to 2 days, or refrigerate for up to 5 days. For longer storage, freeze and reheat as needed.
- Fridge: up to 5 days
- Freezer: up to 2 months
- Reheat: Warm in the air fryer at 150°C for 2–3 minutes or microwave for 10–15 seconds.
Ingredient Spotlight
Almond flour: A low-carb, gluten-free flour that gives these donuts a tender crumb and subtle nutty flavour.
Erythritol: A natural, zero-calorie sweetener that mimics sugar’s sweetness and texture without raising blood sugar.
Cinnamon: Adds warmth and depth, making these donuts irresistibly fragrant and comforting.
FAQs
Can I make these donuts without a silicone mould?
Yes, you can shape the batter into rings by hand or use muffin cases, but the classic donut shape is easiest with a mould.
How do I store leftover donuts?
Store in an airtight container at room temperature for up to 2 days, or refrigerate for up to 5 days.
Can I freeze these donuts?
Yes, freeze cooled donuts in a sealed bag for up to 2 months. Thaw and reheat gently before serving.
Is erythritol safe for keto?
Yes, erythritol is a keto-friendly sweetener with zero net carbs and does not spike blood sugar.
Can I use coconut flour instead of almond flour?
Coconut flour is not a direct substitute; it absorbs more liquid and would require a different recipe ratio.
Keto Air Fryer Cinnamon Sugar Donuts – Soft, Sweet & Guilt-Free
Ingredients
- 120g Almond flour (Finely ground for best texture)
- 2 large Eggs (Room temperature)
- 50g + 20g Erythritol (Divided; for batter and coating)
- 1 tsp Baking powder
- 2 tsp Ground cinnamon (Divided; for batter and coating)
- 40g Butter (Melted, plus extra for brushing)
- 1 tsp Vanilla extract
- Pinch Salt
Instructions
- Preheat your air fryer to 170°C. Lightly grease silicone donut moulds with melted butter.
- In a mixing bowl, whisk together almond flour, 50g erythritol, baking powder, 1 tsp cinnamon, and a pinch of salt.
- In a separate bowl, beat eggs, melted butter, and vanilla extract until smooth.
- Combine wet and dry ingredients, mixing until a thick, smooth batter forms.
- Spoon or pipe the batter evenly into the donut moulds, smoothing the tops.
- Place moulds in the air fryer basket. Air fry for 8–10 minutes until donuts are golden and spring back when pressed.
- Let donuts cool in the moulds for 5 minutes, then gently remove and place on a rack.
- Mix remaining erythritol (20g) with 1 tsp cinnamon in a shallow bowl.
- Brush warm donuts lightly with melted butter, then roll in the cinnamon 'sugar' mixture to coat.
- Serve warm or at room temperature. Enjoy the soft, sweet, cinnamon-kissed treat!
Allergens & Swaps
Allergens: eggs, nuts, dairy
- Butter → Coconut oil — For a dairy-free version
- Almond flour → Sunflower seed flour — Nut-free alternative; texture may vary
- Erythritol → Monk fruit sweetener — Use same amount; adjust to taste
Nutrition (per serving)
- Protein: 6 g
- Fat: 13 g
- Carbs: 3 g
- Energy: 155 kcal
