Cosmic Brownie Overnight Oats
Let’s be honest, nothing hits like a cosmic brownie. The fudgy base, the rainbow chips… it’s pure childhood nostalgia. And while I’ll always love the classic, these Cosmic Brownie Overnight Oats give you all the same flavors in a way that actually fuels your morning.
If you’ve been around here, you know I love a breakfast that feels like dessert but still has protein, fiber, and staying power. These oats are creamy, chocolatey, and just sweet enough. Plus, the rainbow sprinkles on top make them fun (yes, even for adults).
This recipe is also perfect for meal prep. You can make a batch on Sunday and have breakfast ready to go all week. I tested them five times to get the texture just right: not too runny, not too thick, with that classic brownie richness.
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why you’ll love this recipe:
- High in protein to keep you full all morning.
- Tastes like dessert but made with nourishing ingredients.
- Kid-approved thanks to the rainbow chip topping.
- Meal prep friendly so breakfast is one less thing to worry about during the week.
- Customizable with easy swaps for dairy-free, gluten-free, or lower sugar options.
Recipe Tips
Use a chocolate protein powder you actually enjoy. It makes all the difference.
Blend the cottage cheese until smooth before mixing if you want that extra creamy texture without any lumps.
Don’t skip the pinch of salt. It makes the chocolate flavor pop.
These thicken overnight, so if you prefer a looser texture, splash in a little milk before eating.
Ingredient Swaps:
- No cottage cheese ? Use Greek yogurt for a similar creaminess and protein boost.
- Gluten-free ? Make sure you’re using certified gluten-free rolled oats.
- Dairy-free ? Swap cottage cheese with a plant-based yogurt and use a dairy-free protein powder.
- Lower sugar ? Cut back on maple syrup and add a few drops of liquid stevia or monk fruit instead.
Kid Friendly Option: Leave off the protein powder and just use cocoa powder with maple syrup. Still delicious, but a little lighter for kids. And don’t skimp on the rainbow chips, that’s the best part.
Meal Prep Tips: Mix everything in a big bowl, then portion into jars or containers so they’re grab-and-go ready. If you like variety, leave off the toppings and add something different each day (like peanut butter, banana slices, or extra sprinkles).
Storage Tips: Refrigerate up to 5 days. For best texture, add toppings right before serving. Do not freeze, oats don’t thaw well after being soaked.
Troubleshooting:
- Dough feels too dry ? Add an extra splash of milk (start with 1 teaspoon at a time) until the mixture holds together when rolled.
- Dough feels too sticky ? Sprinkle in a little extra oat flour or protein powder until you can roll it without it sticking to your hands.
- Not sweet enough ? Taste the dough before rolling. If you want more sweetness, add an extra drizzle of maple syrup or a sprinkle of coconut sugar.
- Protein powder flavor is overpowering ? Swap half of the protein powder for extra oat flour to mellow out the flavor without losing texture.
- Balls are falling apart after chilling ? Let the dough rest in the fridge for 10 minutes before rolling. This helps the ingredients bind together better.
more breakfast options to try:
Cosmic Brownie Overnight Oats
Equipment
Ingredients
- 2 ½ cups rolled oats
- 2 ½ cups milk of choice
- 1 ¼ cups cottage cheese blended smooth
- ½ cup chocolate protein powder
- ¼ cup cocoa powder
- 5 tbsp maple syrup adjust to taste
- Pinch of salt
- Mini rainbow chips or sprinkles for topping
Instructions
- In a large mixing bowl, combine oats, milk, blended cottage cheese, protein powder, cocoa powder, maple syrup, and salt. Stir until smooth.
- Divide mixture evenly into 5 jars or containers.
- Refrigerate overnight or at least 4 hours to set.
- In the morning, stir and top each serving with rainbow chips before eating.
Made this twice now and love it!! The clean simple eats brownie batter protein is so good in it! I subbed vanilla Greek yogurt in place of cottage cheese, used Kodiak protein oats, and used a vanilla core protein shake instead of milk to increase protein. Also used the PBFIT cacao powder. 10/10 recommend if breastfeeding and trying to increase milk supply!