To make the sauce, melt butter over low heat.
Chocolate should never be melted over direct heat in a saucepan by itself.
In a large pot, melt 1 tablespoon butter over medium-low heat.
In a large, heavy saucepan, melt butter over low heat.
In a saucepan, melt 1 tablespoon butter over medium-high heat.
Meanwhile, melt butter over low heat in a small saucepan.
To ice the cake, melt the chocolate in a double boiler or over very low heat.
Melt over very low heat, then scrape into a bowl and allow to cool a little.
In a small pan, melt butter over low heat.
In a large frying pan, melt butter over medium-high heat.