High-Protein Cinnamon Roll Mug Cake (Printable Page)

Single-serve cinnamon mug cake with protein-packed batter, swirling cinnamon sugar, and tangy cream cheese frosting ready in minutes.

# What You'll Need:

→ Cake Batter

01 - 1/4 cup vanilla protein powder
02 - 2 tablespoons oat flour
03 - 1/4 teaspoon baking powder
04 - 1/4 teaspoon ground cinnamon
05 - 1 tablespoon granulated sweetener
06 - Pinch of salt
07 - 3 tablespoons milk
08 - 1 large egg white
09 - 1/2 teaspoon vanilla extract

→ Cinnamon Swirl

10 - 1/2 tablespoon melted butter or coconut oil
11 - 1 tablespoon brown sugar or coconut sugar
12 - 1/2 teaspoon ground cinnamon

→ Cream Cheese Topping

13 - 1.5 tablespoons light cream cheese, softened
14 - 1 teaspoon milk
15 - 1/2 tablespoon powdered sweetener
16 - 1/4 teaspoon vanilla extract

# Step-by-Step Guide:

01 - In a microwave-safe mug, combine protein powder, oat flour, baking powder, cinnamon, sweetener, and salt. Mix thoroughly until well incorporated.
02 - Add milk, egg white, and vanilla extract to the dry ingredients. Stir until smooth batter forms without lumps.
03 - In a small bowl, combine melted butter, brown sugar, and cinnamon, stirring until mixture reaches swirl consistency.
04 - Drop spoonfuls of cinnamon swirl mixture onto the cake batter and gently swirl through with a toothpick or knife.
05 - Microwave on high for 60 to 90 seconds until cake is set but center remains moist. Do not overcook.
06 - While cake cools slightly, beat together cream cheese, milk, powdered sweetener, and vanilla until smooth.
07 - Spread cream cheese topping over warm mug cake and serve immediately.

# Expert Tips:

01 -
  • It's genuinely ready in seven minutes, which means you can have warm cake while your coffee is still hot.
  • High in protein but tastes indulgent enough that you won't feel like you're eating "diet food."
  • Uses one mug, so cleanup is basically nonexistent.
02 -
  • The egg white is non-negotiable—it's what keeps this from being a dense, protein-powder puck, so don't try to substitute it with something else.
  • Microwave times vary wildly depending on your microwave's power, so 60 seconds might be perfect for you while someone else needs 90; start checking at 60 and add 15-second increments if needed.
  • Softening the cream cheese before you make the cake is actually a life changer—cold cream cheese will sit on top like frosting instead of melting into the cake.
03 -
  • Keep your microwave-safe mug dedicated to this if you make it regularly—somehow mug cakes always stain ceramic slightly, and you'll stop second-guessing whether your mug is actually microwave-safe.
  • Make the cream cheese topping in advance and store it in the fridge; spread it cold over the warm cake for a texture contrast that's actually really satisfying.
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