Easy Hot Fudge Sauce

Ingredients
1, 14 ounce can sweetened condensed milk
4, 1 ounce squares semi-sweet chocolate
2 tablespoons butter
1 teaspoon vanilla

Directions
In a heavy saucepan, add sweetened condensed milk, semi-sweet chocolate and butter.
Over medium-low heat, cook and stir until chocolate is melted.
Remove from heat.
Add vanilla and stir until well combined.
Great served over chocolate cake and vanilla ice cream.
Store sauce in the refrigerator and reheat in microwave.