FOR THE COOKIE BATTER: – Cooking spray – 2/3 cup unsalted butter, at room temp – 1 1/2 cups packed light brown sugar – 1 cup white sugar – 2 teaspoons vanilla extract – 1/2 teaspoon kosher salt – 3 large egg – 3 cups all-purpose flour – 1 teaspoon baking powder – 1 cup chocolate chip FOR THE RED VELVET BROWNIE BATTER: – 1/2 cup unsalted butter, melted – 1 cup white sugar – 1/4 cup unsweetened cocoa powder – 1/2 teaspoon vanilla extract – 1 Tablespoon red food coloring – 1/2 teaspoon white vinegar – 2 large egg – 1/8 teaspoon kosher salt – 3/4 cup all-purpose flour