Rainbow Chip Cosmic Brownies

A dark chocolate topping and rainbow chips make these homemade Rainbow Chip Brownies so rich and delicious.  This copycat recipe for cosmic brownies is the perfect treat for lunch boxes, after school snacks, or bake sales.

Be sure to check out my copycat oatmeal cream pies and banana twins recipe too.

Jump to:

• Why You Will Love This Recipe
• Key Ingredients Needed
• How to make Rainbow Chip Brownies
• Storage Recommendations
• Recipe Tips
• FAQs
• More Brownies
• Recipe

A few years ago I made a pan of these rainbow chip brownies for our life group AND a pan for a blog retreat.  

The running joke from both groups was that I just unwrapped a package of Little Debbie Cosmic Brownies, put them on a plate, and brought those. Everyone thought mine were too perfect looking. 

Why You Will Love This Recipe

Looking for an out-of-this-world brownie recipe? These rainbow chip brownies are just like the store bought cosmic brownies, but the best part is that the homemade brownies tastes so much better!

It is the perfect recipe to use for every chocolate craving you may have. The layer of dark chocolate frosting and colorful rainbow chips make these brownies irresistible. 

With their delicious flavor and fun colors, they're sure to be a hit at your next bake sale or party. Make them today - you won't regret it!

Key Ingredients Needed

With this easy rainbow chip brownie recipe, you can have homemade cosmic brownies in no time. All you need are a few simple ingredients and a 9x13 baking pan.

• Brownies - You can use your favorite box mix or make a homemade brownie recipe. It just needs to be one for a 9x13 pan.
• Chocolate Ganache - Melting dark chocolate chips and heavy cream in the microwave will give you this rich and creamy topping.
• Rainbow Chips - These little sprinkle bits are crunchy and colorful.

How to make Rainbow Chip Brownies

These chewy frosted fudge brownies are the real deal.  They are easy to make too. Just follow our simple recipe and you'll have delicious brownies in your kitchen in no time.

1. Melt the butter in a microwave safe bowl; whisk the dark cocoa powder into it.
2. Beat the eggs in a large mixing bowl until light and frothy. Add the granulated sugar and vanilla extract and beat again.
3. Pour in the melted butter and chocolate mixture and stir until combined.
4. Add the flour, salt, and baking powder and beat until just combined.
5. Spread in a greased baking dish and bake. Remove and place the pan on a wire rack. Cool completely.
6. Place the chocolate chips and heavy cream in a microwave safe bowl. Heat on high for 30 seconds. Stir until melted.
7. Spread a chocolate ganache topping over the top of the cooled brownies and sprinkle with rainbow chips.

Storage Recommendations

• Counter - Place the frosted brownies in an airtight container. They will keep on the counter for 3-4 days.
• Refrigerator - The brownies will stay fresh and delicious for 5-7 days if kept in the refrigerator.
• Freezer - Wrap the brownies tightly in plastic wrap, foil, and place in a freezer safe bag or container. Freezer for 1-2 months. Thaw in the fridge overnight before serving.

Recipe Tips

• Line your pan with foil or parchment paper, so you can lift the finished brownies out of the pan easily.
• For the best fudgy brownies, make sure you do not over bake the brownies. Use a toothpick to test the brownies. There should be a few crumbs on it.
• Different brands of chocolate chips will make the ganache set up differently. We usually use Nestle Tollhouse chocolate chips.

FAQs

More Brownies

• M&M's Brownies
• Peanut Butter Truffle Brownies
• Zebra Brownies - Little Debbie Copycat
• Coconut Nutella Brownies
• Coffee Cream Brownies
• Salted Caramel Brownies

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*The post for Frosted Rainbow Chip Brownies was first published on March 16, 2015.  The photos and post were updated and republished on February 28, 2020.