How To make Aunt Dimity's Butterscotch Brownies

1/2 cup melted butter
2 cups dark brown sugar
2 eggs
1 1/2 cups flour
2 teaspoons baking powder
1 teaspoon vanilla
Preheat oven to 375.
Butter a 9-inch square cake pan. Mix all ingredients together, combining them well. Spread the mixture in the cake pan and bake for 35 to 40 minutes, or until dry on top and almost firm to the touch. Let cool for 10 to15 minutes, then cut into 2-inch squares.
Makes 16 brownies.
NOTES : delicious - rich and satisfying I added pecans