Make Cosmic Brownies:

• Preheat the oven to 325°F and spray a 9×9 baking pan with baking spray.
• Lay a piece of parchment paper in the pan. 
• In a large bowl, beat the water, oil, espresso powder, and egg until combined and fluffy.
• Gradually beat in the brownie mix into the bowl of wet ingredients.
• Spread the brownie batter onto the baking pan.
• Bake in the oven for 40-45 minutes or until a toothpick in the center comes out clean.
• Allow the brownies to cool completely.
• Using the Mickey Mouse cookie cutter, cut out 6 mickey mouse heads and place them onto a wire rack.

Prepare Chocolate Ganache:

• Using a small pot, bring the heavy whipping cream and espresso grounds to a simmer.
• Pour over the chocolate chips into a medium bowl.
• Whisk until the melted chocolate is smooth. 
• Gradually pour the ganache over the Mickey brownies, making sure the tops and sides are completely covered.
• Sprinkle the rainbow chips over the top and allow the ganache to harden. 
• Serve and enjoy!