Instructions
1 cup butter
1 cup brown sugar, packed
1/4 cup white sugar
1 egg + 1 egg yolk
1 tablespoon milk
2 teaspoons vanilla
2 1/2 cup flour
1 teaspoon salt
12 ounces milk chocolate, coarsely chopped
1 1/2 cups pistachio nuts, chopped
In a small saucepan, melt butter over low heat; cool slightly. Transfer butter to large mixing bowl. Add sugars and beat well until light and fluffy. Whisk together the egg, egg yolk, milk and vanilla. Add to butter mixture, and stir until combined. Beat in flour and salt just until combined. Fold in chocolate and nuts. Cover and chill dough for 1 hour. Using a 1/4 cup measure drop dough onto parchment-lined baking sheets, about 3 inches apart. Bake at 350 degrees for 10 to 12 minutes or until edges are light brown. Cool on cookie sheets for 2 minutes before removing to wire racks to cool.
