Butterscotch Brownies

1 cup unsalted butter , at room temperature 3 cups firmly packed golden brown sugar 4 large eggs 1 tablespoon vanilla extract 3 cups all-purpose flour 1[...]

3/4 cup butter , melted 2 cups light brown sugar , packed 3 eggs 2 cups flour 2 teaspoons baking powder 1/2 teaspoon salt 1 teaspoon vanilla extract 1 cup[...]

2/3 cup all-purpose flour 1 teaspoon baking powder 1/2 cup ground walnuts (optional) 1/4 teaspoon salt 1/4 cup shortening 1 cup packed brown sugar 1 egg 1[...]