I make this protein baked oatmeal when I want breakfast done for the next three days and I refuse to think about it again. It's soft in the middle, lightly golden on top, not dry, not chalky, and actually filling. The vanilla protein powder blends right in so it tastes like a cozy oat bake, not a gym shake.
It's simple. Stir. Pour. Bake. That's it. I love it warm with yogurt or cold straight from the fridge while standing at the counter. If you like my Banana Protein Muffins or my Ninja Creami Dairy Free High Protein Vanilla Ice Cream, this one fits right into that high protein, real life breakfast rotation.
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Quick Answer
- Time: 50 minutes total
- Texture: Soft, slightly custardy center with golden top
- Flavor: Light vanilla, mild sweetness, juicy blueberries
- Best for: Meal prep, busy mornings, high protein breakfast
- Method: Mix wet + dry, bake in one dish
This protein baked oatmeal is a high protein breakfast casserole made with oats, protein powder, yogurt, eggs, and milk, baked until set and sliceable.
The ingredients
Quick oats: Use quick oats for a softer, more cohesive texture. Rolled oats work but will be slightly chewier.
Vanilla protein powder: Choose one you actually like the taste of. If it tastes weird in a shake, it will taste weird here.
Milk: Dairy or unsweetened almond milk both work.
Vanilla Greek yogurt: Adds moisture and boosts protein without making it dry.
Eggs: These bind everything so it slices cleanly.
Maple syrup: Just enough sweetness without turning it into dessert.
Vanilla extract: Makes the protein powder taste more natural.
Salt: Tiny amount. Do not skip.
Fresh blueberries: Adds little juicy pockets so it doesn't feel dense.
For the ingredients quantities go to the recipe card below
Steps-by-step Instructions for the High Protein Baked Oatmeal
1. Preheat
Set oven to 350°F. Lightly grease an 8x8 baking dish.
2. Mix Dry Ingredients
In a large bowl, stir oats, protein powder, and salt. Break up any protein powder clumps with the back of your spoon.
3. Whisk Wet Ingredients
In another bowl, whisk milk, yogurt, eggs, maple syrup, and vanilla until smooth.
4. Combine
Pour wet mixture into dry. Stir until fully coated. It should look thick but not dry.
5. Fold Blueberries
Gently fold them in. Do not overmix.
6. Transfer
Spread into baking dish evenly.
7. Bake
Bake 35 to 40 minutes. The center should jiggle slightly but not look wet.
8. Rest
Let cool 10 minutes. It firms up as it sits. Do not skip this or it will fall apart.
Sophie Tips
- If your protein powder clumps, sift it first.
- If the center looks wet after 40 minutes, bake 5 more minutes. Ovens lie.
- If it tastes dry, you baked it too long. Pull it when the center still has a slight wobble.
- I tested this once without yogurt. It was sad. Keep the yogurt.
Troubleshooting
Why is my baked protein oatmeal dry?
Overbaking or too much protein powder.
Why is it gummy?
Not enough baking time or too much liquid.
Why does protein powder taste chalky?
You used one you don't like. This recipe cannot fix that.
Variations
- Add mashed banana for natural sweetness
- Stir in peanut butter for high protein baked oatmeal peanut butter style
- Swap blueberries for raspberries or chopped apple
- Add cinnamon for a cozy version
- Turn into baked oatmeal protein bars by slicing thinner
Serving Ideas
Warm with extra Greek yogurt and drizzle of maple syrup.
Cold from the fridge with almond butter.
Crumble over yogurt for a high protein breakfast bowl.
Serve with scrambled eggs if you're extra hungry.
Storage Tips
Store in fridge up to 4 days.
Reheat 30 to 45 seconds in microwave.
Freezes well sliced. Wrap individually.
FAQ
Yes. Replace with ¼ cup extra oats and slightly reduce milk. It won't be as high protein.
Whey or whey blend gives best texture. Plant protein works but may be slightly denser.
Yes. Bake in a slightly larger dish so it's thinner. Cool fully before slicing.
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Protein Baked Oatmeal
Equipment
- Mixing bowls
- Whisk
- Spatula
- 8x8 baking dish
Ingredients
- 2 cups quick oats
- 1 scoop vanilla protein powder
- 1½ cups milk
- ½ cup vanilla Greek yogurt
- 2 large eggs
- 2 tablespoons maple syrup
- 1 teaspoon vanilla extract
- ¼ teaspoon salt
- ½ cup fresh blueberries
Instructions
- Heat oven to 350°F and grease baking dish.
- Combine oats, protein powder, and salt in a bowl until evenly blended.
- In a separate bowl, beat milk, yogurt, eggs, maple syrup, and vanilla until smooth.
- Add wet mixture to oat mixture and stir thoroughly.
- Fold in blueberries carefully.
- Spread batter evenly into prepared pan.
- Bake 35 to 40 minutes until center is just set and top is lightly golden.
- Allow to cool before slicing for clean cuts.
Notes
- Do not overbake or it will dry out.
- If using plant protein, add 1 to 2 tablespoons extra milk.
- Let rest before slicing so structure sets properly.
- Store slices with parchment between layers for easy grab and go.
Sophie Viau says
This protein baked oatmeal is the perfect high protein breakfast for meal prep. Made with oats, protein powder, Greek yogurt, and blueberries, it bakes into a soft, sliceable breakfast casserole that’s easy, filling, and not dry.