High Protein Breakfast Cake

This is my go-to high protein breakfast cake recipe, and it never lets me down.

The idea of eating cake for breakfast always felt a little rebellious until I started making this version. It’s built entirely from breakfast ingredients, oats, yogurt, eggs, and a touch of protein powder, baked into something that just happens to taste like cake.

I make this on Sunday and slice into it all week. It’s soft, lightly sweet, and genuinely keeps me full in a way that a bowl of cereal never has.

Why You’ll Love This Recipe

A few reasons this earns a spot in the weekly rotation.

Tastes like a treat: genuinely cake-like texture and flavor.
Built from breakfast staples: oats, yogurt, and eggs, nothing exotic required.
Slices cleanly: great for grab-and-go mornings.
Freezer friendly: bake once, eat for weeks.

Why This Works

Blending the oats into a fine flour before mixing the batter is what gives this cake its soft, tender crumb instead of a dense, chewy one. Whole rolled oats left unblended create pockets of chew throughout the cake, while blended oats disappear into the batter and bake up soft.

Step-by-Step

Blend the rolled oats in a food processor or blender until they reach a fine, flour-like consistency. This usually takes about 30 seconds of pulsing.

In a large bowl, whisk together the eggs, Greek yogurt, mashed banana, and vanilla until smooth. Stir in the oat flour, protein powder, baking powder, and a pinch of salt, mixing just until combined.

Don’t overmix once the dry ingredients go in, this is what keeps the cake tender rather than dense and tough. A few small lumps are perfectly fine.

Pour the batter into a greased 8-inch round or square pan and smooth the top. Bake at 350 degrees for 25 to 30 minutes, until a toothpick inserted in the center comes out clean.

Let the cake cool in the pan for 10 minutes before slicing, this gives it time to set properly. Slice into wedges or squares and serve.

Tips

• Blend the oats fully into a fine flour, this is what gives the cake its soft texture.
• Don’t overmix the batter once the dry ingredients are added.
• Use ripe, well-mashed banana for natural sweetness and moisture.
• Let the cake cool before slicing, it firms up as it cools.
• A toothpick test is the most reliable way to know it’s done.

Variations

• Fold in blueberries or chocolate chips before baking.
• Add cinnamon or nutmeg for a warmer flavor.
• Top with a light glaze made from powdered sugar and milk.
• Use a loaf pan instead for a more traditional slice shape.

What to Serve With

• A dollop of Greek yogurt.
• Fresh berries on the side.
• A drizzle of honey or maple syrup.
• A cup of coffee or tea.

Storage

Refrigerator: store in an airtight container for up to 5 days.

Freezer: freeze individual slices for up to 3 months.

Reheating: warm slices in the microwave for 20 to 30 seconds, or enjoy cold.

Make Ahead

This cake keeps beautifully all week, making it one of the most genuinely convenient breakfasts to bake once and eat from for days.

Frequently Asked Questions

Can I use quick oats instead of rolled oats?

Yes, both blend into flour easily, rolled oats give a slightly heartier texture but either works.

Can I make this without protein powder?

Yes, omit it and add an extra quarter cup of oat flour in its place.

Is this cake very sweet?

No, it’s lightly sweetened, more breakfast than dessert, though you can add extra honey if you prefer it sweeter.

Final Thoughts

This cake proves breakfast doesn’t have to be boring to be nutritious. Give it a try this weekend and slice into it all week long.

High Protein Breakfast Cake

Recipe by Jessica WilliamsCourse: BreakfastCuisine: AmericanDifficulty: Easy

Servings

8

slices

Prep time

10

minutes

Cooking time

28

minutes

Total time

38

minutes

Calories

195

kcal

A soft, lightly sweet cake made from oats, yogurt, and eggs, built entirely from breakfast ingredients.

Ingredients

• 2 cups rolled oats

• 3 large eggs

• 1 cup plain Greek yogurt

• 1 ripe banana, mashed

• 1 teaspoon vanilla extract

• 1/2 cup vanilla protein powder

• 1.5 teaspoons baking powder

• Pinch of salt

• 3 tablespoons honey or maple syrup

Directions

• Preheat oven to 350 degrees and grease an 8-inch pan.
• Blend rolled oats into a fine flour.
• Whisk eggs, yogurt, banana, and vanilla until smooth.
• Stir in oat flour, protein powder, baking powder, salt, and honey, mixing just until combined.
• Pour into the prepared pan and bake 25-30 minutes until a toothpick comes out clean.
• Cool 10 minutes in the pan before slicing.

Notes

Blend the oats into a fine flour and avoid overmixing the batter for the softest texture.