Caramel Bars

1 stick of butter
2 cups brown sugar
3 eggs
1 tsp. vanilla
1/2 tsp salt
1 3/4 tsp baking powder
1 3/4 cup + 3 Tbsp. flour
1/2 cup chopped walnuts (optional)

Melt butter over stove top.  Add sugar, melt; cool.  Add eggs, vanilla, and dry ingredients.  Bake at 350* in a greased 9 x 13 pan for 25 minutes.