why make this recipe
Cosmic brownies are a childhood favorite that bring back sweet memories. This easy small batch cosmic brownies recipe allows you to enjoy these delicious treats without making a huge batch. Perfect for satisfying your sweet tooth, these brownies are rich, fudgy, and topped with colorful rainbow sprinkles. It’s a quick and simple way to indulge in a nostalgic dessert!
how to make Easy small batch cosmic brownies
Ingredients
- 4 tbsp butter
- 1 tbsp oil (vegetable or canola)
- 1/3 cup granulated sugar
- 1/4 cup brown sugar
- 1 egg
- 1 tsp vanilla extract
- 1/4 tsp salt
- 1/4 cup all-purpose flour
- 1/3 cup cocoa powder
- 2/3 cup semi-sweet chocolate chips
- 1/4 cup heavy cream
- Rainbow chocolate sprinkles (for topping)
Directions
- Start by preheating the oven to 325°F. Line a 9×5 or an 8×5 baking pan with parchment paper and set aside.
- In a large bowl, melt the butter and oil in the microwave or on the stovetop in a medium saucepan.
- If you melted the butter in a saucepan, transfer it to a large bowl. Otherwise, just add in the granulated sugar and the brown sugar to the butter. Whisk until the mixture is fully combined.
- Add in the egg and vanilla extract, then whisk to combine.
- Whisk in the flour, cocoa powder, and salt until the flour mixture disappears.
- Pour the brownie batter into the prepared baking pan. Spread the batter evenly to cover the entire pan and bake in the preheated oven for 25 minutes.
- You will know your brownies are ready when you insert a toothpick into the center and it comes out with just a few wet crumbs.
- Make the chocolate ganache by heating the heavy cream and then mixing it with the chocolate chips until smooth, then spread it over the cooled brownies.
- Top with rainbow chocolate sprinkles.

how to serve Easy small batch cosmic brownies
Serve these cosmic brownies warm or at room temperature. You can cut them into small squares and enjoy them on their own or with a scoop of ice cream for an extra treat. They make a great snack for kids and adults alike.
how to store Easy small batch cosmic brownies
Store any leftovers in an airtight container at room temperature for up to 3 days. If you want to keep them longer, you can refrigerate them for up to a week. You can also freeze them for up to 3 months. Just wrap them tightly in plastic wrap and then place them in a freezer-safe bag.
tips to make Easy small batch cosmic brownies
- Make sure not to overmix the batter after adding the flour to keep the brownies fudgy.
- You can add nuts or other mix-ins to the batter for a different flavor.
- Let the brownies cool completely before adding the chocolate ganache for a smoother finish.
variation
You can experiment with different types of chocolate for the ganache, such as white chocolate or dark chocolate, to give your cosmic brownies a unique twist.
FAQs
Q: Can I use a different type of sugar?
A: Yes, you can use other types of sugar, but the flavor and texture may vary slightly.
Q: How can I make the brownies more chocolatey?
A: You can add an extra tablespoon of cocoa powder or an additional 1/3 cup of chocolate chips to the batter.
Q: Can I make these brownies vegan?
A: You can substitute the egg with flaxseed meal mixed with water and use vegan butter to create a vegan version of this recipe.
Enjoy making and indulging in these delightful cosmic brownies!

Cosmic Brownies
Ingredients
Method
- Preheat the oven to 325°F. Line a 9x5 or an 8x5 baking pan with parchment paper and set aside.
- Melt the butter and oil in a microwave or on the stovetop in a medium saucepan.
- Transfer melted butter to a large bowl and add the granulated sugar and brown sugar. Whisk until fully combined.
- Add the egg and vanilla extract, then whisk to combine.
- Whisk in the flour, cocoa powder, and salt until the flour mixture disappears.
- Pour the brownie batter into the prepared baking pan. Spread evenly and bake for 25 minutes.
- Check doneness by inserting a toothpick in the center; it should come out with a few wet crumbs.
- Make the chocolate ganache by heating the heavy cream and mixing it with the chocolate chips until smooth.
- Spread the ganache over the cooled brownies and top with rainbow chocolate sprinkles.