Margaret's Hot Fudge Sauce

1/2 cup half and half
1- 1 & 1/3 TBSP unsalted butter
1 cup chocolate chips
1 tsp vanilla

Boil the cream and the butter together to a full boil. Watch it because it will boil over.
Remove from heat and add chocolate chips.
Let it sit for a minute or two and then whisk it together and add vanilla.

Pour over ice cream. The texture is a little different from a traditional hot fudge, as it thickens to a more fudgey consistency. But it's really, yummy.