Ingredients
Dry Ingredients
• 1 scoop protein powder (whey or whey-blend works best; vanilla or chocolate)
• 1 tablespoon oat flour or finely blended oats
• 1 tablespoon flour of choice (all-purpose, whole wheat, or almond flour)
• 1/2 teaspoon baking powder
• Pinch of salt
Wet Ingredients
• 1 large egg or 2 egg whites
• 2 tablespoons Greek yogurt (plain or vanilla, preferably thick)
• 2 tablespoons milk of choice (dairy or non-dairy)
• 1 to 2 tablespoons sweetener (maple syrup, honey, sugar, or zero-cal sweetener)
• 1/2 teaspoon vanilla extract
Optional Add-Ins
• Chocolate chips or chopped dark chocolate
• Mashed banana or applesauce (1–2 tablespoons for extra moisture)
• Cocoa powder (1 teaspoon for chocolate version)
• Peanut butter or almond butter swirl
• Cinnamon or espresso powder
Equipment
• One microwave-safe mug (12–14 oz is ideal)
• Fork or small whisk
• Measuring spoons
Step-by-Step Instructions
Step 1: Prepare the Mug
Choose a microwave-safe mug and lightly grease it with cooking spray or a small amount of butter. This helps prevent sticking and makes cleanup easier.
Step 2: Mix Dry Ingredients
Add the protein powder, oat flour, flour, baking powder, and salt directly into the mug. Stir thoroughly with a fork until the mixture looks uniform and no clumps remain. This step is important for even rising.
Step 3: Add Wet Ingredients
Crack in the egg or add egg whites. Add the yogurt, milk, sweetener, and vanilla extract. Mix slowly at first, then more vigorously, scraping the sides and bottom of the mug until a smooth, thick batter forms.
The batter should be pourable but not runny. If it looks too thick, add milk one teaspoon at a time. If it looks too thin, add a small pinch of flour or protein powder.
Step 4: Fold in Add-Ins
If using chocolate chips, fruit, or nut butter, gently fold them in now. For a swirl effect, add nut butter on top and lightly drag a knife through the batter.
Step 5: Microwave
Place the mug in the microwave and cook on high for 45 seconds. Remove and check the center. Continue microwaving in 10–15 second intervals until the cake has risen and the center looks just set.
Total cook time is usually 60–90 seconds depending on your microwave. Avoid overcooking, as protein cakes firm up quickly once overheated.
Step 6: Rest
Let the mug cake rest for 1–2 minutes. This allows the structure to finish setting and improves texture.
Texture and Doneness Guide
• Slightly glossy top means moist and fluffy
• Fully matte and pulling from sides means done
• Dry, shrunken edges mean overcooked
The cake should spring back gently when touched.
Optional Toppings
• Extra Greek yogurt mixed with sweetener
• Fresh berries or sliced banana
• Melted chocolate or protein frosting
• Peanut butter drizzle
• A dusting of cocoa or cinnamon
Approximate Nutrition (Will Vary by Ingredients)
• Protein: 25–35 grams
• Calories: 250–350
• High satiety and balanced macros
Storage and Reheating
This mug cake is best eaten fresh, but it can be covered and stored in the fridge for up to one day. Reheat gently for 10–15 seconds in the microwave to restore softness.
