• Preheat oven to 350 F. Line a 8x8 pan with parchment paper and spray.

Brownie:

• Start by melting the butter and 3 ounces of chocolate chips together in the microwave. I start with 30 seconds and then stir, continue in 15 second intervals until melted.
• In a medium mixing bowl, mix melted butter/chocolate with sugars. Add the egg and vanilla and mix again.
• Whisk in baking powder, salt, flour and cocoa powder. Fold in ¼ cup of chocolate chips and set aside.

Blondie:

• Melt butter. In another medium mixing bowl mix together butter and sugars. Add the egg and vanilla and mix again.
• Add baking powder, salt and flour and mix again until completely combined.
• Using a 2-3 tablespoon cookie scoop or spoon, start with the brownie batter and scoop balls of batter into the pan, leaving space in between for blondie batter. Do not use all the batter, save about ¼ of it for the end.
• Now take the blondie batter and fill in spaces so that there is black and white batter alternating. Then use the leftover brown batter to fill in any holes, and lightly spread the batter around so that it's every distrputed around the pan. You want to do it lightly so that the brownie batter doesn't take over the blondie batter.
• Bake for about 27-30 minutes. You want the edges to start to pull away from the sides of the pan and darken, and a toothpick inserted in the middle to come out clean. Then allow them to sit and firm up while they cool.