Two all-time favorite desserts, chocolate chip cookies and fudge brownies, are combined into an indulgent cookie dough-topped brownie.
Preheat the oven to 350 degrees.
Mix flour, baking soda, and salt in medium bowl and set aside. Beat the butter and sugars in a large bowl with an electric mixer on medium speed until light and fluffy. Add the egg and 2 teaspoons of the vanilla extract and mix well. Gradually beat in the flour mixture on low speed until well mixed. Stir in chocolate the chips and set aside.
Prepare the brownie mix as directed on the package, adding the remaining 1 teaspoon vanilla extract and the peppermint extract. Spread in a greased 13-by-9-inch baking pan.
Bake for 15 minutes. Drop cookie dough by tablespoonfuls on the brownie, covering the top evenly. (Batter will spread during baking) .
Bake for 20 to 25 minutes longer or until cookie top is golden brown. Cool in the pan on a wire rack. Cut into bars.