Congo Squares - cooking recipe

Ingredients

1 c. butter, melted
3 eggs
2 1/2 tsp. baking powder
1 tsp. vanilla
1 (12 oz.) pkg. chocolate chips
1 lb. brown sugar
2 1/2 c. flour
1/2 tsp. salt
1 c. nuts (optional)

Preparation

Combine all ingredients; stir well.
Put in greased and floured 9 x 13-inch pan.
Bake at 350\u00b0 for 25 to 30 minutes.