Soft, warm, and fluffy with a buttery cinnamon swirl — but made high-protein so you can enjoy it as breakfast, snack, or dessert without the sugar crash. This version uses cottage cheese and protein powder to keep it moist, tender, and satisfying.
Servings & Timing
- Servings: 9 squares
- Prep Time: 10 minutes
- Cook Time: 25–30 minutes
- Total Time: 35–40 minutes
Ingredients List
Dry Ingredients
- 1 cup oat flour (or blended oats)
- ½ cup vanilla whey or casein protein powder
- 1 teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon salt
Wet Ingredients
- 1 cup cottage cheese
- 2 large eggs
- ¼ cup Greek yogurt
- 3 tablespoons melted butter or coconut oil
- ⅓ cup sugar-free sweetener (or regular sugar)
- 1 teaspoon vanilla extract
Cinnamon Swirl Filling
- 2 tablespoons melted butter
- 2 tablespoons brown sweetener (or brown sugar)
- 1 tablespoon cinnamon
Instructions
-
Prepare your pan
Preheat the oven to 350°F (175°C). Grease an 8×8 baking dish or line with parchment. -
Blend the wet ingredients
Add cottage cheese, eggs, Greek yogurt, melted butter, sweetener, and vanilla into a blender. Blend until smooth and creamy. -
Mix the dry ingredients
In a large bowl, whisk oat flour, protein powder, baking powder, baking soda, and salt. -
Combine
Pour the blended wet mixture into the dry mixture. Stir gently until fully combined (do not overmix). -
Pour batter into pan
Spread the batter evenly. -
Make the cinnamon swirl
Mix melted butter, cinnamon, and brown sweetener. Drizzle over the top of the batter.
Use a knife to gently swirl into the batter (don’t overmix — you want the swirl design on top). -
Bake
Bake for 25–30 minutes, or until golden and a toothpick comes out clean. -
Cool and slice
Let it cool at least 10 minutes, then cut into squares.
Additional Notes
- Casein protein makes the cake extra moist and fluffy.
- If using whey only, add 1 extra tablespoon yogurt so it doesn’t dry out.
- This cake stays soft even after cooling because of the cottage cheese.
Dietary Info
- High-Protein
- Low-Sugar
- Can Be Gluten-Free (use certified GF oats)
- Kid-Friendly
Flavor Tips & Variations
- Add ½ teaspoon nutmeg for a bakery-style flavor.
- For a cream cheese glaze, mix 2 tbsp softened cream cheese + 1 tbsp sweetener + splash of milk.
- Add ¼ cup chopped pecans or walnuts for crunch.
Ingredient Substitutions
- Oat flour → almond flour (use 1¼ cups, reduce yogurt by 1 tbsp)
- Greek yogurt → low-fat yogurt
- Brown sugar sweetener → coconut sugar
Recipe Variations & Serving Suggestions
- High-Protein Cinnamon Roll Mug Cake: use ¼ of the batter and microwave 60–90 seconds.
- Cinnamon Protein French Toast Bake: pour batter over bread cubes and bake.
