- 1 cup plus 2 tablespoons all-purpose flour
- 1/2 teaspoon baking soda
- 1/2 teaspoon salt
- 1/2 cup (1 stick) butter, softened
- 3/4 cup packed brown sugar
- 1 teaspoon vanilla extract
- 1 large egg
- 2 cups semi-sweet chocolate chips (we always use Toll House), divided
- 1/2 cup chopped walnuts
- Preheat oven to 375 degrees F. Spray a 9”x9” baking pan with non-stick cooking spray.
- In a small bowl, whisk together flour, baking soda and salt. Set aside.
- In the bowl of a stand mixer, cream together butter, brown sugar and vanilla. Mix in egg.
- Slowly add flour mixture to the mixing bowl with the butter and sugar mixture, beating after each addition. Fold in only 1¼ cups of the semi-sweet chocolate chips and all of the nuts, mixing evenly throughout the batter.
- Spread the batter into the prepared pan and bake for 20 minutes. Remove pan from the oven and set on a wire rack. Sprinkle the top of the pan with the remaining ¾ cups of semi-sweet chocolate chips, then let stand for about 5 minutes or until the morsels are shiny and melting. Using an offset spatula, spread evenly over the top and all the way to the edges.
- Allow the pan to cool completely – still on a wire rack. Refrigerate for 5 to 10 minutes until the chocolate frosting is set.
- Once cooled, cut into bars or squares.