Get the best of both worlds with these soft and chewy marble cookies made with chocolate and vanilla cookie dough swirled together. And loaded with chocolate chips. Duh
1/2 cup unsalted butter, at room temperature
1/2 cup packed light brown sugar
1/4 cup granulated sugar
1 large egg, at room temperature
2 teaspoons vanilla extract
1 1/2 cup all purpose flour + 3 tablespoons all purpose flour
1/4 teaspoon baking soda
1/4 teaspoon baking powder
1/2 teaspoon salt
3 tablespoons cocoa powder
1 cup chocolate chips
