Protein-Packed Chocolate Peanut Butter Mug Cake

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A quick and easy single-serving mug cake combining chocolate and peanut butter flavors with added protein for a satisfying dessert. This american-inspired desserts (high protein) ready in about 7 minutes layers whey protein powder (chocolate flavor), all-purpose flour, baking powder into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 320 calories and feeds 1, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 5 min Cook: 2 min Serves 1 American cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: In a microwave-safe mug, whisk together 1/4 cup chocolate whey protein powder, 3 tbsp all-purpose flour, 1/4 tsp baking powder, 1 tbsp unsweetened cocoa powder, 2 tbsp granulated sugar, and a pinch of salt until combined.
  2. Step 2: Add 3 tbsp milk and 1/4 tsp vanilla extract to the dry ingredients and stir until a smooth batter forms.
  3. Step 3: Drop 2 tbsp natural peanut butter into the center of the batter and gently swirl it with a spoon to create ribbons.
  4. Step 4: Microwave on high for 60-75 seconds until the cake has risen and is set but still moist in the center.
  5. Step 5: Let cool for 2 minutes before enjoying directly from the mug.

Frequently asked questions

How long does Protein-Packed Chocolate Peanut Butter Mug Cake take to make?

Total time is about 7 minutes (5 min prep + 2 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover Protein-Packed Chocolate Peanut Butter Mug Cake?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in Protein-Packed Chocolate Peanut Butter Mug Cake?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Protein-Packed Chocolate Peanut Butter Mug Cake for a different number of people?

The recipe is written for 1 servings. Multiply each ingredient by (your serving target / 1). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Protein-Packed Chocolate Peanut Butter Mug Cake high protein?

Yes — this recipe is tagged high protein based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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