Gourmet Cosmic Brownies Bars (Printable)

Fudgy brownie bars with glossy chocolate ganache and rainbow candy topping for a nostalgic, gourmet dessert.

# What You'll Need:

→ Brownie Base

01 - 6 oz unsalted butter, melted
02 - 1 cup granulated sugar
03 - ½ cup light brown sugar, packed
04 - 2 large eggs
05 - 1 tsp pure vanilla extract
06 - ⅔ cup unsweetened cocoa powder
07 - ⅔ cup all-purpose flour
08 - ½ tsp fine sea salt

→ Chocolate Ganache

09 - 4 oz semi-sweet chocolate, chopped
10 - ½ cup heavy cream
11 - 1 tbsp unsalted butter

→ Topping

12 - ⅓ cup rainbow candy-coated chocolate chips or mini M&M's

# How To Make:

01 - Preheat the oven to 350°F. Line an 8×8-inch square baking pan with parchment paper, leaving an overhang on two sides for easy removal.
02 - In a large mixing bowl, whisk together the melted butter, granulated sugar, and brown sugar until smooth and glossy.
03 - Add the eggs and vanilla extract to the sugar mixture. Whisk until well combined and the batter has slightly lightened in color.
04 - Sift the cocoa powder, flour, and salt directly into the wet mixture. Gently fold with a spatula until just combined — avoid overmixing to keep the texture tender.
05 - Pour the batter into the prepared pan and smooth the top with a spatula. Bake for 23 to 25 minutes, until the edges are set but the center still appears slightly underbaked.
06 - Transfer the pan to a wire rack and let the brownie base cool completely in the pan.
07 - Place the chopped chocolate and butter in a heatproof bowl. Heat the heavy cream in a small saucepan over medium heat until just steaming — do not boil — then pour it over the chocolate. Let sit for 2 minutes.
08 - Stir the chocolate and cream mixture gently until smooth, silky, and glossy.
09 - Spread the ganache evenly over the cooled brownie base. Immediately sprinkle the candy-coated chocolate chips across the surface in an even layer.
10 - Refrigerate for at least 30 minutes or until the ganache is fully set. Lift the brownie slab from the pan using the parchment overhang, slice into 12 bars, and serve chilled or at room temperature.

# Expert Tips:

01 -
  • The ganache sets into a silky shell that cracks perfectly when you bite into it, revealing a dense, truffle like center underneath.
  • These taste like childhood but with the kind of deep chocolate complexity that makes adults reach for seconds before the kids even notice.
02 -
  • The brownies must be completely cool before you add ganache, because even a little residual warmth will melt the chocolate into a muddy puddle instead of a distinct layer.
  • A toothpick test will not work here because you actually want the center slightly underdone when you pull them from the oven.
03 -
  • Let the brownie batter sit in the pan for five minutes before baking because this hydrates the flour and produces a chewier, more cohesive crumb.
  • Always chop your chocolate from a bar rather than using chocolate chips because chips contain stabilizers that prevent them from melting into a smooth ganache.