Butterscotch Cake With Marshmallows with brownies

1/2 cup butter or 1/2 cup margarine 1 ounce unsweetened chocolate square 1 1/2 cups firmly packed brown sugar 3 eggs 1 teaspoon vanilla extract 1 1/2 cups[...]

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[...]