Preheat the oven to 350F and line a 9x9 baking dish with parchment paper.

Start with the brownie batter by whisking together the sugar, flour, cocoa, salt, and baking powder.

In another medium bowl, whisk the eggs, oil, and vanilla until combined.

Melt the baking chocolate in a microwave-safe bowl in 30-second increments, mixing in between each one. Continue until fully melted.

Combine the wet ingredients with the dry ingredients until well combined and then add 1/2 cup of chocolate chips.

Pour the brownie batter into the baking dish and then sprinkle 1 cup of mallow bites and 1/2 cup of chocolate chips over the batter; set aside.

Begin mixing the cookie dough by whisking together the flour, salt, and baking soda in a large bowl.

Beat the butter, sugars, egg, and vanilla in a stand mixer until combined.

Gradually mix the dry ingredients into the wet ingredients and fold in 3/4 cup of chocolate chips.

Using a small ice cream scoop, drop dollops of cookie dough onto the brownie batter and sprinkle another 1/2 cup of mallow bites onto the cookie dough.

Bake in the oven for 35-45 minutes, until a toothpick comes out clean from the center. Allow to cool completely before cutting, enjoy!