
Brookie Baked Oatmeal (Protein Packed + Easy!)
This Brookie Baked Oatmeal has the best texture and is loaded with brownie and cookie flavors! You would never know it’s secretly healthy, packed with protein, vegan, and gluten-free. Meal prep this clean eating breakfast to enjoy all week long. Kid-friendly too!
Brookie Baked Oatmeal (Protein Packed + Easy!)

This Brookie Baked Oatmeal has the best texture and is loaded with brownie and cookie flavors! You would never know it’s secretly healthy, packed with protein, vegan, and gluten-free. Meal prep this clean eating breakfast to enjoy all week long. Kid-friendly too!
Ingredients
Oatmeal Base Ingredients:
- 1 cup mashed banana (about 2 ripe bananas)
- 2 cups old-fashioned rolled oats (or quick-cooking oats)
- 2-4 Tbs. honey (or pure maple syrup)
- 1 tsp. vanilla extract
- 2 cups plant-based milk + ½ cup water (see note 1)
- ⅛ tsp. pink Himalayan salt
Brownie Layer
- 3 Tbs. chocolate plant-based protein powder (my favorite brand!) (see note 3)
- 3 Tbs. cacao powder
Cookie Layer
- 3 Tbs. vanilla plant-based protein powder
- 2 Tbs. cashew butter (or any nut/seed butter. Code "SHH20" for free shipping)
- optional: ¼ tsp. maca powder
- ⅓ cup dairy-free mini chocolate chips or chocolate of choice
Optional Cookie Dough Topping
- ½ cup cashew butter or any nut/seed butter of choice
- 2 Tbs. honey or pure maple syrup
- ½ tsp. vanilla extract
- 1-2 Tbs. milk of choice
- ½ cup. oat flour
- 3-4 Tbs. dairy-free mini chocolate chips
Instructions
- Preheat the oven to 350 F. and get out a 2-quart baking dish.
- In a medium bowl, mash the banana with the back of a fork until smooth. Next, add all oatmeal base ingredients in and mix until well combined.
- Pour 1½ cups of the mixture into your 2-quart baking dish.
- To the baking dish mixture, add the chocolate protein powder and cacao powder. Mix until combined.
- To the medium bowl mixture, add the cookie layer ingredients and mix until combined. Pour mixture into the 2-quart baking dish and swirl both brownie and cookie layer together to make a marbled look.
- Place in the oven to bake at 350 F. for 35-40 minutes (mine is always perfect after 40 minutes).
- Optional: While the oats are baking you can make the optional cookie dough topping by combining all cookie dough topping ingredients in a medium bowl. After the oats are done baking, crumble the cookie dough on top (you will probably have leftover cookie dough so form it into balls and freeze it for an easy healthy dessert!)
- Serve with fresh berries, banana slices, nut butter, or your favorite milk. Store in the fridge for up to a week and enjoy a premade healthy breakfast all week long. After cooling completely or if you store it in the refrigerator, the baked oatmeal will hold its shape. You can also freeze this baked oatmeal unbaked or baked. If unbaked, let it come to room temperature on the counter and then bake it according to the recipe. Enjoy!
Notes
- Banana substitute: you can use 1 cup of unsweetened applesauce in place of the bananas.
- Protein powder substitute: You can use any plant-based protein powder if that is all you have on hand. You can also use whey protein powder, but I’ve found it does change the texture a bit. If you’re using flavored or sweetened protein powder, I suggest adding less honey or maple syrup until you get your desired taste.
- Liquid: You can use any liquid of choice for this recipe. You can swap the milk for all water or do a different combination.
- How do you store brookie baked oatmeal? Store the cooked baked oatmeal in the fridge for up to a week. When ready to eat, microwave for about 1 minute or reheat in the oven. You can also eat it cold! Serve with desired toppings. Baked oatmeal topping ideas are listed above.
- Can you freeze baked oatmeal? Yes! You can freeze the baked oatmeal either uncooked or cooked for up to 2 months. Thaw on your counter a few hours before popping it into the oven.
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Nutrition Information:
Yield:
9Serving Size:
one piece without cookie dough toppingAmount Per Serving: Calories: 200Total Fat: 6.4gCarbohydrates: 31.6gNet Carbohydrates: 27.5gFiber: 4.1gSugar: 8.5gSugar Alcohols: 0gProtein: 7.1g
Love Baked Oatmeal? Try these flavors!
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Brookie Oatmeal
Now, if you’ve come to this recipe, you are my kind of person! You love brownie and cookie flavors with your cup of coffee in the morning or afternoon (or really any time of day)! YAY! You’ll definitely want to save my vegan peanut butter blondies, healthy zucchini brownies, and my brownie cookie skillet (this is for if you’re actually looking for a brookie recipe. Yum.) for later too then. But, for now, you’re here for this brookie baked oatmeal, and I don’t blame you.
This healthy brookie baked oatmeal recipe is one of the more decadent flavors of all my baked oatmeal flavors. You seriously would never guess this recipe is actually good for you! It’s the perfect healthy breakfast to start the day on one of the cooler mornings. Plus, having your house smell like brownie cookie goodness is one of the best things ever! Now, I have lots and lots of baked oatmeal flavors here on the blog, but I’m really considering making a Pb&j baked oats recipe after this brookie baked oatmeal because I’m currently obsessed with that flavor combo. Let me know in the comments if this is something you’d like to see 🙂

So what makes this brookie baked oatmeal healthy? Here’s the shortened version:
- Vegan plant-based protein powder (here is the brand I use and love)
- Oats (find the health benefits of oats here.)
- Plant-based milk (high in potassium and iron)
- Banana (high in potassium and complex carbs. You can it use in all my baked oatmeal recipes)
- Pink Himalayan Salt (rich in minerals and less processed than table salt. Read more about the benefits of pink salt here.

Baked Oatmeal Without Eggs or Milk
This brookie baked oatmeal recipe uses absolutely no eggs or regular milk! Just like in my Matcha Latte recipe, we use plant-based milk as listed above. Feel free to use any milk you have on hand though! And even if you don’t have milk, you can sub with good ole’ H2O (water). The oats and protein powder make this oatmeal bake soft, chewy, and slightly fluffy without having to add any eggs. I know Growingannanas baked oats recipe uses eggs, so if you have an allergy or an egg shortage, my recipe is perfect!
How to Make Brookie Baked Oats
Now we won’t be making cottage cheese baked oats, because firstly, I’ve never tried them before. Although I think that will be on my list to recipe test to increase the protein of my baked oatmeal recipes even more.
But, as I just said above, you don’t need any eggs or flax eggs for this baked oatmeal recipe. It’s completely vegan and plant-based. The beauty of this oatmeal recipe is that you can use whatever protein powder or milk you have on hand. Even if you don’t have milk, you can substitute it for all water. That’s how easy and simple it is!
You only need the baking dish too! No extra bowl for mixing. You mix it all right in the baking dish and then pop it in the oven. Yay for fewer dishes!

High Protein Baked Oatmeal
This high-protein baked oatmeal recipe is made with my very favorite unflavored plant-based protein powder. And if you’re looking for more great vegan breakfast options, check out these 12 Easy Vegan Protein Breakfasts!
I’ve gotten the question a few times if you can substitute the protein powder for collagen to make them collagen baked oats. To this, I say yes absolutely! Collagen should work perfectly. Let me know if you try in the comments below.

Toppings For Baked Oatmeal
Baked Oatmeal is delicious on its own, but here are a few ideas of what you can serve with it:
- Plant-Based Milk (I add a splash on top and it adds the perfect moisture)
- Protein Cream Cheese Icing (recipe from my Cinnamon Roll Baked Oatmeal)
- Regular Cream Cheese Icing
- Maple Cream Cheese Icing
- Nut Butter of Choice (Use code “shh20” for FREE SHIPPING at Georgia Grinders) The maple pecan nut butter from Georgia Grinders is so good on top of this!
- Fresh Berries
- Fresh Banana
- Chopped Nuts
- Chocolate Chips
- Baked Oats With PB2 (I love topping baked oatmeal with PB2 or any kind of powdered peanut butter)


How to Store Brookie Baked Oatmeal
Store the cooked baked oatmeal in the fridge for up to a week. When ready to eat, microwave for about 1 minute or reheat in the oven. You can also eat it cold! Serve with desired toppings. Baked oatmeal topping ideas are listed above.
Can You Freeze Baked Oatmeal?
Yes! You can freeze the baked oatmeal either uncooked or cooked for up to 2 months. Thaw it on your counter a few hours before popping it into the oven.
I cannot wait for you to give this Brookie Baked Oatmeal a try! Please snap a picture and share it with me! Seeing your kitchen creations makes my day and encourages me to keep creating new recipes for you!
One Comment
Rachel Phelps
Hi there, do you know if frozen bananas (defrosted) work in baked oatmeal? Thank you ☺️