How to Make Classic Homemade Cosmic Brownies from Scratch

Homemade cosmic brownies far outshine the store-bought kind: chewy brownie base, a rich fudgy chocolate ganache, and colorful candy-coated mini chocolate chips on top.

This easy copycat cosmic brownies recipe delivers a nostalgic, irresistible treat you can make by hand with simple ingredients.

WHY YOU’LL LOVE THEM

Perfect texture. These brownies are chewy with a dense crumb and finished with a thick, glossy ganache that adds decadence.

Better than store-bought. Homemade ingredients and fresh ganache give these a richer, more satisfying chocolate flavor than the packaged version.

Simple to make. No special equipment is required — just basic tools and straightforward steps.

HOW TO MAKE Copycat Cosmic BROWNIES

Preheat the oven to 350°F and line an 8×8-inch square baking pan with parchment paper. Parchment makes it easy to lift the brownies from the pan once baked.

BROWNIE BATTER

Chop the baker’s chocolate and place it in a microwave-safe bowl. Melt in 20-second intervals, stirring between each until smooth. Set aside to cool slightly.

In a large bowl, whisk the melted butter and sugar together by hand until smooth.

Add the eggs and vanilla, then whisk vigorously until the mixture becomes lighter in color and slightly airy—about 5 minutes.

Pour in the melted chocolate and whisk until fully combined.

Sift in the flour, cocoa powder, and salt. Fold the dry ingredients into the wet with a rubber spatula until just combined—avoid overmixing.

Fold in the semi-sweet chocolate chips, then pour the batter into the prepared pan and spread evenly.

Bake for about 28 minutes, or until the edges are set and the center is just firm. Let the brownies cool completely in the pan to room temperature before adding the ganache.

CHOCOLATE GANACHE

Place the chocolate chips for the ganache into a bowl and set aside.

In a separate microwave-safe bowl, heat the heavy cream until it’s just below boiling (about 45 seconds).

Pour the hot cream over the chocolate chips and let it sit for a minute. Stir until the mixture is smooth and glossy. If some chocolate remains unmelted, microwave briefly in 10–15 second bursts and stir until fully melted.

Pour the ganache over the cooled brownies and spread it into an even layer. Immediately sprinkle the mini candy-coated chocolate chips over the top to decorate.

Chill the brownies in the refrigerator for about 2 hours to allow the ganache to set. Once firm, slice into squares and serve at room temperature for the best texture and flavor.

Frequently Asked Questions

STORING THE BROWNIES

Store brownies in an airtight container at room temperature for up to 3 days, or refrigerate for up to one week. Bring slices to room temperature before serving for the best texture.

SERVING THE BROWNIES

These are best served at room temperature. Slice after the ganache has fully set in the fridge, then allow the pieces to warm slightly before serving.

WHAT DOES SPOONED AND LEVELLED FLOUR MEAN?

Spoon the flour into your measuring cup and level it off with a knife. Do not scoop the cup directly into the flour container, which compresses the flour and adds extra volume.

DO I NEED TO USE ROOM TEMPERATURE EGGS?

Yes. Room-temperature eggs incorporate more easily into the batter, helping create the desired chewy texture.

If you try these homemade cosmic brownies, please leave a rating and comment below!

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