Melt the "butter" for twenty seconds in the microwave. Add the rice/soy milk milk. Stir in the sugar- the milk and butter mixture will soak it all up, so you shouldn't need to add any more. The sauce should be thinner then normal frosting, so that it can be easily drizzled over cupcakes, brownies, cakes, cookies-or any other dessert you can dream up. This frosting also won't harden, even after it's been in the 'fridge.