• Preheat the oven to 350 degrees. Use parchment paper or a silpat mat to line a baking sheet.
• Mix flour, cocoa powder, baking powder and salt in a small bowl and set aside.
• Melt the butter and chocolate chips in a saucepan over low-medium heat. Stir continuously until melted. Remove from heat and set aside.
• In stand mixer, beat eggs, brown sugar and granulated sugar on high speed for 3-4 minutes until the mixture is light and airy.
• *You want to do these next steps by hand. Slowly add in the chocolate and butter mixture to the egg mixture in the mixing bowl and fold together with a spatula. Slowly add in the dry ingredients and continue to fold together with spatula until just combined.
• Divide cookie dough into 12 equal sized cookie dough balls and place them on your prepared baking sheet. Put 6 cookies per baking sheet. (This recipe makes BIG cookies, so if you'd like smaller cookies, divide dough into 18 cookies.)
• Bake cookies at 350 degrees for 12 minutes (about 10 minutes if you make smaller cookies!).
• Remove from oven and let cookies cool on baking sheet for 10 minutes. Remove to cooling rack and let the cookies cool completely.

Make Chocolate Ganache

• Add chocolate chips and heavy cream to a small, microwave-safe bowl and microwave for 30 second increments (stir between increments) until completely melted and smooth.
• Spoon 1-2 tablespoons of chocolate ganache on top of each brownie cookie and sprinkle with Rainbow Candy Chips.