Dessert Recipes: Butterscotch Brownies by Tina

This is an old recipe my mom made back in the 70s

Melt 1/4 c butter in a medium saucepan. Stir in:
1 c light brown sugar
1 egg
3/4 c flour
1 tsp baking powder
1/2 tsp salt
1/2 tsp vanilla
1/2 c walnuts

Spread in an 8x8 pan and bake at 350° for 25 minutes. Cool completely before serving.