Chocolate Buttercream

1 cup butter, room temperature
6 cups powdered sugar (may need a little more)
1/2 cup whipping cream
2 tsp pure vanilla extract

In the bowl of an electric mixer fitted with the paddle attachment, cream butter until smooth and creamy, 2 to 3 minutes. With mixer on low speed, add 6 cups sugar, milk, and vanilla; mix until light and fluffy. If necessary, gradually add more powdered sugar to reach desired consistency.