• Preheat oven to 350 F.
• Line a 13x9 baking pan with parchment so that extra hangs over the side to create handles.

Brownie Layer

• For the brownie layer, place the chocolate chips in a large bowl.
• Melt the butter. Pour melted butter over the chocolate chips and let it sit for a minute to soften chocolate. Stir until smooth.
• To the melted chocolate, add egg, cocoa, sugar, and vanilla. Stir to combine.
• Stir in flour just until no more traces of flour remain, do not over-mix.
• Scrape brownie batter into prepared pan and set aside.

Cookie Layer

• To make the cookie layer - in a medium bowl, whisk together flour, baking soda, and salt. Set aside.
• Using a mixer, combine softened butter and both sugars. Beat until well combined.
• Add egg and vanilla and mix again until combined.
• Add flour mixture and mix until no traces of flour remain.
• Stir in 1 cup of the chocolate chips, reserving the remaining to add on top at the end.
• Drop dough by spoonfuls on top of the brownie batter. You do not need to spread it.
• Use remaining 1/3 cup of chocolate chips to sprinkle across the top of the brownie batter and cookie dough.
• Cover the pan with aluminum foil and bake for 20 minutes.
• Remove foil and return to oven. Bake another 20 minutes, or until the edges of the brownies are shiny and the cookie is golden brown.