Birthday Cake Protein Mug Cake
This single-serve Birthday Cake Protein Mug Cake is ready in 45–60 seconds. It uses vanilla protein powder for a moist, cake-like texture with optional sprinkles for a festive touch. Great for busy mornings, post-workout snacks, or tiny celebrations.
Ingredients
- 3 Tbsp vanilla protein powder
- 1 Tbsp oat flour or all-purpose flour
- 1 Tbsp brown sugar or sweetener of choice
- 1/4 tsp baking powder **see note about baking powder
- 1 pinch salt
- 3 Tbsp milk
- 1 Tbsp melted butter
- 1/2 tsp vanilla
- 1-2 Tbsp rainbow sprinkles
Instructions
- 1. In a microwave-safe mug, whisk the protein powder, oat flour, brown sugar, baking powder, and a pinch of salt until evenly combined.
- 2. Add the milk, melted butter or coconut oil, vanilla extract. Stir until the batter is smooth and no dry streaks remain.If it seems too dry, add more milk a teaspoon at a time.
- 3. Fold in the sprinkles gently to reduce color bleed.
- 4. Microwave on high for 45–60 seconds. The top should be set but slightly glossy. Avoid overcooking or the cake will dry out.*If your mug cake rises too much and overflows, omit the baking powder next time. I used the Optimum Nutrition protein powder and definitely did not need any baking powder.
- 5. Let the mug cake cool for 1–2 minutes. Top with Greek yogurt, whipped cream, or extra sprinkles if desired, then enjoy.
Notes
**Baking powder: If your mug cake rises too much or overflows, try omitting the baking powder next time. Some protein powders don’t need it for lift. I used Optimum Nutrition whey protein, and it baked perfectly without any baking powder.