1 c. butter
2 c. sugar
2 tsp. vanilla extract
4 eggs
1 c. flour
3/4 c. cocoa
1/2 tsp. baking powder
1/4 tsp. salt
1 c. chopped walnuts (optsp.)

Heat oven to 350. Grease 9 x 13 pan. Microwave butter in large glass bowl until melted. Stir in sugar and vanilla. Add eggs, one at a time, beating well with spoon after each addition. Add flour, cocoa, baking powder, and salt. Beat until well blended. Stir in nuts. Pour into pan and bake 30-35 minutes or until brownies begin to pull away from sides of pan. Cool completely.