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)

NutrientAmount
Calories75 kcal
Protein6g
Fat5g
Saturated Fat0.5g
Carbohydrates2.5g
Fiber1g
Net Carbs1.5g
Sugar0g
Sodium80mg

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