Step 1

Melt your butter and unsweetened chocolate in short increments in the microwave, or using a double boiler.

Step 2

In a large bowl add the powdered sugar, vanilla and the melted chocolate mixture.

Step 3

Whip together with a stand mixer or hand mixer until all combined.

Step 4

Add in half of the milk and continue mixing, adding more milk if needed to reach fluffy frosting consistency.