Introduction
Craving something light, sweet, and satisfying without breaking your carb bank? This Keto Angel Food Cake Mug Cake is your quick-fix dessert solution. It captures all the airy, sponge-like texture of traditional angel food cake — but in a single-serving, microwave-friendly format, made without sugar or flour.
Perfect for those moments when you need dessert fast, this recipe comes together in under 5 minutes with clean, keto-approved ingredients like egg white, almond flour, and a sugar-free sweetener. It’s a low-carb treat that feels indulgent without kicking you out of ketosis.
Let’s dive into this fluffy, protein-rich dessert that’s as beautiful as it is delicious.
🧾 Ingredients (Serves 1)
- 1 large egg white (room temperature)
- 2 tbsp superfine almond flour (or 1 tbsp coconut flour for nut-free option)
- 1 tbsp powdered erythritol or monk fruit sweetener
- 1/4 tsp cream of tartar
- 1/4 tsp vanilla extract
- Pinch of salt
🍽️ Tools You’ll Need
- Microwave-safe mug or ramekin (10–12 oz)
- Electric hand mixer or small whisk
- Measuring spoons
- Rubber spatula (optional)
🕒 Prep and Cook Time
- Prep Time: 3 minutes
- Cook Time: 1 minute
- Total Time: 4–5 minutes

👩🍳 Instructions
Step 1: Whip the Egg White
In a clean bowl, add the egg white and cream of tartar. Whisk vigorously using a hand mixer or mini whisk until soft peaks form — this means the mixture should hold shape but still have a slightly curled tip.
This step is crucial. The whipped egg white is what gives the cake its iconic airy, angel food cake texture.
Step 2: Fold in Other Ingredients
Gently fold in the powdered erythritol, almond flour (or coconut flour), vanilla extract, and a pinch of salt. Use a rubber spatula or a spoon to carefully incorporate without deflating the whipped egg whites.
Be gentle. Overmixing will knock out the air and leave you with a dense sponge.
Step 3: Transfer to Mug
Lightly grease your mug or ramekin with coconut oil or butter. Spoon the batter into the mug. Don’t tap it or smooth the top too much — the airiness should remain.
Make sure the mug is microwave-safe and has enough headroom, as the cake will rise slightly during cooking.
Step 4: Microwave the Mug Cake
Microwave on HIGH for 50 to 70 seconds, depending on your microwave’s wattage. Watch closely — the cake should rise slightly and firm up. Avoid overcooking, or it will dry out.
Let it cool for 1–2 minutes. The texture will set further as it rests.
Step 5: Serve and Enjoy
Enjoy your angel food mug cake warm as-is, or top it with keto-friendly whipped cream, fresh berries (like raspberries or blackberries), or a drizzle of sugar-free syrup.
🍴 Flavor Variations
- Lemon Angel Cake: Add 1/2 tsp lemon zest and a few drops of lemon extract.
- Almond Joy: Add 1/2 tsp almond extract and top with shredded unsweetened coconut.
- Berry Burst: Fold in 1 tbsp chopped strawberries or blueberries (adjust carb count).
- Chocolate Swirl: Add a tiny swirl of melted sugar-free chocolate for a mocha twist.
🌿 Tips for Success
- Room Temperature Egg White: It whips better and gives more volume.
- Sweetener Type: Use powdered erythritol or monk fruit for best texture — granules can deflate the batter.
- Nut-Free Option: Use 1 tbsp coconut flour instead of almond flour (coconut flour is more absorbent).
- Make It Fluffier: For extra volume, whip the egg white longer until stiff peaks form.
🧮 Nutrition Facts (Per Mug Cake)
Nutrient | Amount |
---|---|
Calories | 75 kcal |
Protein | 6g |
Fat | 5g |
Saturated Fat | 0.5g |
Carbohydrates | 2.5g |
Fiber | 1g |
Net Carbs | 1.5g |
Sugar | 0g |
Sodium | 80mg |
Based on almond flour version. Coconut flour may slightly vary.
🧠 WW (Weight Watchers) SmartPoints
For those using WW Blue, Purple, or Green, this mug cake is:
- 2 SmartPoints per serving
This assumes a zero-point egg white and low-fat almond flour. Using full-fat whipped cream or toppings will add points.
📌 Storage & Make-Ahead
- Single Serve: This mug cake is best enjoyed fresh.
- Prep Ahead: You can pre-mix the dry ingredients and store in a small jar. When ready, just whip an egg white and fold in the dry mix.
📝 Final Thoughts
This Keto Angel Food Cake Mug Cake is the ideal dessert when you want something fast, fluffy, and sweet without the guilt. With just a handful of pantry staples and a microwave, you can enjoy a beautifully airy treat that fits your macros and takes under 5 minutes to make.
Whether you’re on a strict keto diet or just cutting back on sugar and gluten, this is a dessert you can enjoy any day of the week — without derailing your progress.
✅ Recipe Summary
- Name: Keto Angel Food Cake Mug Cake
- Type: Dessert, Snack
- Prep Time: 3 minutes
- Cook Time: 1 minute
- Total Time: 4–5 minutes
- Servings: 1
- Net Carbs: 1.5g
- Difficulty: Easy
- Tools: Microwave, Mug, Whisk