Easy double chocolate chip brownies

Easy Double Chocolate Chip Brownies

12 oz chocolate chips, divided
1 C granulated sugar
1/2 C (1 stick) butter or margarine
3 eggs
1 1/4 C all purpose flour
1/4 t baking soda
1 t vanilla
1/2 C chopped nuts

Preheat oven to 350 degrees. Grease 13x9 baking dish and set aside. Melt 1 C morsels and butter in large heavy duty saucepan over low heat. Stir until smooth. Remove from heat and add eggs one at a time, stirring well. Add flour, sugar, baking soda and vanilla, stirring after each addition. Stir in remaining morsels and nuts, if desired. Spread into prepared pan. Bake for 18-22 minutes or until toothpick inserted into the center comes out slightly sticky. Cool completely in pan on wire rack.