1/4 cup butter
1 cup firmly packed brown sugar
1 tsp vanilla extract
1 cup all-purpose flour
1/4 tsp baking soda
1/4 tsp salt
1/4 cup white chocolate chips
1/4 cup milk chocolate chips
1/2 cups chopped pecans or walnuts
Preheat oven to 350 degrees.
Grease the bottom of an 8-in square baking pan.
In a medium mixing bowl cream together the butter and brown sugar; beat in the egg and vanilla extract.
In a small bowl combine the flour, baking soda, and salt. Add the flour mixture to the butter mixture and beat just until blended. Do not overmix! Add the white chocolate chips, milk chocolate chips, and the nuts. Stir until blended.
Spread the batter into the prepared pan. Bake at 350 degrees for about 25 minutes or until a toothpick inserted in the center comes out clean. Allow to cool 10 minutes before cutting to serve.