Butterscotch Brownies

Ingredients

• 1/4 c. butter, shortening, or vegetable oil
• 3/4 c. packed light brown sugar
• 1 egg
• 1 c. flour
• 1 tsp. baking powder
• 1/2 tsp. salt
• 1/2 tsp. vanilla
• 1/2 c. chopped walnuts