Gather all ingredients at room temperature.
In a large mixing bowl, beat the softened butter with an electric mixer until light and fluffy (about 2-3 minutes).
Gradually add cocoa powder and sifted powdered sugar on low speed until fully combined.
Slowly pour in heavy cream and vanilla extract while mixing until smooth.
If the frosting is too thick, add more cream one tablespoon at a time until desired consistency is reached.
Taste and adjust sweetness if necessary.
