[header] How to make mushroom sauce [title] Melt 2 tablespoons butter or margarine. [step] There are a couple different ways you can do this. You can put the butter in a microwave-safe container and melt it in the microwave ten seconds at a time, stirring it every ten seconds. 
The butter will melt very quickly this way, so don't let it burn. You can also melt the butter on the stove.