Get out the cortlands. This is delicious on black magic cake (below) and on applesauce spice cake.
Brown Sugar Icing
This will cover a bundt, double layer, or 9x13-inch cake.
1 cup brown sugar
4 Tablespoons milk
6 Tablespoons butter
1 cup powdered (icing) sugar
Place the brown sugar, milk, and butter in a heavy-bottomed pot over medium heat. Once they've melted, bring them to a boil for 2 minutes. Remove from the heat and let cool 5 minutes. Add icing sugar and beat to combine well.