Take a small saucepan and place all the ingredients except the vanilla. Stir on high heat until the butter is melted. Then stop stirring and bring to a boil, once it reaches a good boil turn the heat to medium and cook for 8 minutes without stirring.

After the 8 minutes remove from the heat add the vanilla extract and stir.

Let it cool for about 10 minutes then place in a glass container for storage. This will thicken as it cools. Let it cool to room temperature before storing it covered in the fridge.