High-Protein Keto Chocolate Mug Cake

A single-serve chocolate mug cake topped with cream and raspberries — low carb, sugar-free, and ready in 5 minutes

This high-protein keto chocolate mug cake mixes in one mug and cooks in the microwave. Cocoa, chocolate protein powder, and almond flour give it 18 g of protein and 5 g net carbs. Top with sugar-free whipped cream and a few raspberries like the photo.

Low carb, sugar-free, and done in about 5 minutes.

Prep2 min

Cook3 min

Servings1

Protein18g

Net Carbs5g

Calories280

Why you’ll love this mug cake

18g protein per cake
Only 5g net carbs
Single-serve portion
Ready in 5 minutes
Deep chocolate flavor
No oven required

Health notes

High protein: Chocolate protein powder and an egg make it filling.
Low carb: Almond flour and unsweetened cocoa keep net carbs low.
Sugar-free: Use a powdered keto sweetener and sugar-free cream.
Quick dessert: Microwave instead of baking a full cake.

Key element — microwave timing

Start at 90 seconds. Overcooking makes the cake rubbery instead of the soft, risen top in the photo.

Ingredients

Mug cake batter (1 serving)

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

Toppings

2 Tbsp sugar-free whipped cream
2–3 fresh raspberries

Swaps

Higher protein: Use a double scoop and reduce almond flour by 1 Tbsp.
Dairy-free: Coconut oil and coconut whipped cream.
Mocha: Add ½ tsp instant coffee.
No protein powder: Use 2 extra Tbsp almond flour plus 1 extra tsp cocoa (protein drops).

Instructions

Mix the batter. In a large microwave-safe mug, whisk almond flour, protein powder, cocoa, sweetener, baking powder, and salt. Stir in egg, almond milk, melted butter, and vanilla until smooth.

Cook. Microwave on high for 90 seconds to 2 minutes, depending on wattage, until the top is set but still slightly soft.

Rest. Let the cake sit 1 minute so it finishes cooking and holds its rise.

Finish. Top with whipped cream and raspberries. Eat warm.

Pro tips

Use a tall mug so the cake can rise without overflowing.
Start checking at 90 seconds — microwaves vary.
Sift the cocoa if it looks clumpy.
A pinch of espresso powder deepens the chocolate.
Best eaten fresh and warm.

Nutrition

Nutrient	Per mug cake
Calories	280
Protein	18g
Net carbohydrates	5g
Total carbohydrates	9g
Fiber	4g
Total fat	18g
Sodium	240mg

Estimates based on almond flour, chocolate protein powder, cocoa, and sugar-free toppings. Exact numbers vary with protein powder brand.

Variations

Peanut butter

Swirl 1 tsp natural peanut butter into the batter before cooking.

Mint chocolate

Add a drop of peppermint extract.

Chocolate chip

Fold in 1 tsp sugar-free chocolate chips.

Double serving

Double the ingredients and use a larger mug; add 20–30 seconds.

Storage

Method	Time	Notes
Best fresh	Same day	Microwaved cakes are best warm
Refrigerator	Up to 2 days	Reheat gently in the microwave
Freezer	Not recommended	Texture changes after freezing

FAQ

Yes. Almond flour, cocoa, and a sugar-free sweetener keep it around 5g net carbs with 18g protein.

It was overcooked. Start checking at 90 seconds and stop when the top just looks set.

Yes. Replace it with 2 extra Tbsp almond flour and 1 extra tsp cocoa. Protein will be lower.

Any large microwave-safe mug works. Tall is better so it can rise.

Mix the dry ingredients ahead. Add the wet ingredients right before cooking.

A chocolate whey or plant protein you already like. Bitter powders taste stronger after cooking.

Test your knowledge

5 quick questions about this chocolate mug cake

1. Protein per mug cake?

2. Net carbs per mug cake?

3. How do you avoid a rubbery cake?

4. About how long does this take?

5. Best way to eat leftovers?

High-Protein Chocolate Mug Cake