Chango Bars

from the story Jalapeno Bagels

1/2 cup butter

1/2 cup margarine

2 cups brown sugar

3 eggs

2 1/3 cups flour

1 tbsp baking powder

1 tsp salt

1 cup chocolate chips

1 cup mixed nuts

Melt the butter and margarine together. Meanwhile, cream the brown sugar with the eggs, then add the melted butter mixture to it. Blend in the flour, powder and salt, and mix until smooth. Stir in the chocolate chips and nuts, then pour into a greased 9" x 13" pan, and bake at 350 F for 45 to 50 minutes.