chocolate butter creme frosting

1.5 cups (3 sticks) unsalted butter, softened
2 tbsp milk
9 oz semisweet chocolate, melted and cooled to lukewarm
1 tsp vanilla extract
2 1/4 cups sifted confectioner's sugar

1. on medium, beat butter fro 3 minutes until creamy. add milk and beat until smooth.
2. add melted chocolate and beat well, approximately 2 minutes.
3. add vanilla and beat for 3 minutes.
4. gradually add sugar and beat on low until creamy and of desired consistency.

notes: can't recall where exactly i found this recipe, but it is tasty! it has a light, fluffy consistency, different that your typical butter creme frosting. the flavor reminds me of the insides of a keebler elf cookie.