When it comes to having a little sweet treat these Cosmic Protein Brownies are a go to. These are right out of my childhood I am tell ya! Of course we had to add a bit of protein powder, but hey it’s all about those gains! Let’s get baking!

A close up shot of Cosmic Protein Brownies being eaten.

Key Ingredients for these Protein Brownies.

These Cosmic Protein Brownies are super simple and easy to make. Let’s break down some of the most important ingredients you’ll need. 

Chocolate Protein Powder – Not all protein powders are made the same. For baking, finding a “finer” powder is going to be best. There are a ton of different flavours you can use. We use a decent amount of cocoa powder so even if you used vanilla protein powder, it’ll get the job done! 

Cocoa Powder – I’m a fan of really rich, dark cocoa powder. Any brand or style will do. 

Pumpkin Puree – We used pumpkin puree (and eggs) as the main binder for the brownies. Don’t worry about your brownies tasting like a pumpkin pie. There’s so chocolate flavour you won’t even know it’s there. 

Greek Yogurt – This is the key to making a great frosting. It has a little bit of protein (About 10g per 100ml) and gives the frosting a very needed tang that helps cut through the sweetness. 

A close up shot of Cosmic Protein Brownies. The chocolate icing and sprinkles are oozing over the side.

How to Bake with Pumpkin Puree.

When it comes to using pumpkin puree, there are a few tips you should know to make sure your baking is the best it can be. 

Pumpkin puree can be a good substitute for things like eggs. It’s a vegan friendly binder. It’s not the same as eggs, so don’t expect to be able to sub out your eggs and give it the exact same outcome. It’s a bit heavier and dense.

How to make Protein Brownie Icing.

I love this icing recipe, it’s sweet, creamy, holds its shape and has this awesome tang that just makes it so delicious. 

Into a large mixing bowl, add ½ cup of Vanilla Greek Yogurt, about 2 scoops of chocolate protein powder, ¼ cup of icing sugar, 1 tbsp of cocoa powder. Give it a good mix, making sure all of the cocoa powder and protein is fully incorporated. 

You’ll want to  make sure your brownies are fully cooled before you ice them. I find the Greek yogurt thins out if you put it on a right out of the oven brownie.

A close up shot of Cosmic Protein Brownies. The chocolate icing and sprinkles are oozing over the side.

Other Recipes to check out!

If you liked the sound of these Cosmic Protein Brownies, here are a few other baked goods I think you’ll love!

Chocolate Cottage Cheese Cookie Dough

Easy Chocolate Mug Cake

Protein Oatmeal Cookies

Cosmic Protein Brownies

Print Recipe
A close up shot of a silver fork taking away a cormer of these Cosmic Protein Brownies


For the Dry

  • 1 cup All-Purpose Flour
  • 1 cup Chocolate Protein Powder
  • 1/2 cup Cocoa Powder
  • 1 tsp Baking Powder

For the Wet

  • 1 cup Milk
  • 3 Eggs
  • 3/4 cup no cal Sweetener
  • 1/2 cup Pumpkin Puree
  • 1/4 cup Olive Oil
  • 2 tbs olive oil Needs an extra 2tbs!
  • 2 tsp Vanilla Extract

For the Icing

  • 1/2 cup Chocolate Chips Melted
  • 1/2 cup Chocolate Protein Powder
  • 1/2 cup Greek Yogurt
  • 1/4 cup Icing Sugar
  • 1 tbsp Milk
  • 1 cup Sprinkles


  • Preheat your oven to 350F.
  • Into a large mixing bowl, combine 1 cup of flour, 1 cup chocolate protein powder, ½ cup cocoa powder, ½ tsp baking powder and a good pinch of kosher salt. Give it a good whisk.
  • Into the same bowl, add 1 cup milk (you can use any milk you’d like), 3 large eggs, 1/3 cup sweetener, ½ cup pumpkin puree, 1/4 cup + 2 tbsp of olive oil and 2 tsp vanilla extract. Mix well and place in an oiled 9×9 pan and bake for 36-38 min or until the centre looks set. Remove from the oven and allow to fully cool.
  • While your brownies are baking, combine 1/2 cup melted chocolate, 1/2 cup chocolate protein powder, 1/2 cup greek yogurt, 1/4 cup icing sugar and 1 tbsp of milk. Mix well until smooth.
  • Once your brownies are cooled, lather on the protein icing and top with lots of sprinkles!
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