High-Protein Keto Vanilla Mug Cake

A single-serve vanilla cake in a mug — low carb, sugar-free, and ready in 5 minutes

This high-protein keto vanilla mug cake mixes in one cup and cooks in the microwave. Almond flour, vanilla protein powder, and an egg bake into a soft yellow cake. Top with whipped cream, sugar-free chocolate sauce, and a few chips for 16 g of protein and 3 g net carbs.

Low carb, sugar-free, and done before the oven preheats.

Prep4 min

Cook1 min

Servings1

Protein16g

Net Carbs3g

Calories280

Why you’ll love this mug cake

16g protein per cake
Only 3g net carbs
No oven
Ready in about 5 minutes
Soft vanilla crumb
Easy whipped-cream topping

Health notes

High protein: One scoop of protein powder and an egg make it filling.
Low carb: Almond flour replaces wheat flour.
Sugar-free: Use a keto sweetener and sugar-free toppings.
Single serve: No leftover cake sitting out.

Key element — stop the microwave early

Mug cakes keep cooking after you take them out. Pull the cake when the top looks just set. Extra seconds make it rubbery.

Ingredients

Cake (1 mug)

3 Tbsp almond flour
1 scoop vanilla protein powder
1 Tbsp powdered sugar-free sweetener
½ tsp baking powder
Pinch of salt
1 large egg
1 Tbsp melted butter or coconut oil
2 Tbsp unsweetened almond milk
½ tsp vanilla extract

Topping

2 Tbsp unsweetened whipped cream
1 Tbsp sugar-free chocolate sauce
1 tsp sugar-free chocolate chips

Swaps

Higher protein: Keep the full scoop of protein powder.
Dairy-free: Use coconut oil and coconut whipped cream.
Chocolate cake: Swap in chocolate protein and 1 tsp cocoa.
Oven: Bake at 350°F for 12–14 minutes in a ramekin.

Instructions

Mix dry. In a 10–12 oz microwave-safe mug, stir almond flour, protein powder, sweetener, baking powder, and salt.

Add wet. Mix in the egg, melted butter, almond milk, and vanilla until no dry pockets remain. The batter should come about halfway up the mug.

Microwave. Cook on high 60–75 seconds, until the top is just set and a toothpick comes out with a few moist crumbs. Rest 1 minute.

Top and eat. Add whipped cream, chocolate sauce, and chips. Eat warm.

Pro tips

Use a larger mug so the cake can rise without overflowing.
Start at 60 seconds; every microwave runs hot differently.
If the batter is too thick, add 1 tsp more milk.
Let it sit 60 seconds after cooking so the crumb finishes setting.
The toppings in the photo are optional — the cake stands on its own.

Nutrition

Nutrient	Per cake
Calories	280
Protein	16g
Net carbohydrates	3g
Total carbohydrates	5g
Fiber	2g
Total fat	20g
Sodium	210mg

Estimates based on almond flour, vanilla protein powder, egg, and light toppings. Exact numbers vary with protein powder and how much sauce you add.

Variations

Birthday cake

Add a drop of almond extract and sugar-free sprinkles.

Lemon

Add ½ tsp lemon zest.

Cinnamon roll

Stir ¼ tsp cinnamon into the batter and drizzle sugar-free icing.

Berry

Press 3 raspberries into the batter before cooking.

Storage

Method	Time	Notes
Best	Right away	Mug cakes dry as they sit
Refrigerator	1 day	Reheat 10–15 seconds
Dry mix	1 week	Bag the dry ingredients, add wet when ready

FAQ

Yes. With almond flour and a keto sweetener, one cake stays around 3g net carbs before extra toppings.

It cooked too long. Stop when the top is just set and let it finish off the heat.

Yes. Use 1 extra tablespoon of almond flour. Protein will be lower.

Yes. Bake in a ramekin at 350°F for 12–14 minutes.

A 10–12 oz mug. Smaller cups overflow when the cake rises.

No. They match the photo. The cake is still good with just whipped cream.

Test your knowledge

5 quick questions about this vanilla mug cake

1. Protein per cake?

2. Net carbs per cake?

3. When should you stop the microwave?

4. About how long does this take?

5. Best time to eat it?

High-Protein Vanilla Mug Cake