Sour Cream Fudge Frosting
- 4 Tbs. (1/2 stick) unsalted butter
- 1/4 cup heavy cream
- 10 oz. bittersweet chocolate, chopped
- 3/4 cup sour cream
- 1 cup confectioners’ sugar
Whisk in the sour cream until fully combined. Then whisk in the confectioners' sugar. Let stand until thick enough to spread, about 10 minutes. If the frosting becomes too stiff to spread, rewarm briefly over low heat and whisk again until smooth.
For mocha flavor: Add 1 Tbs. instant espresso powder or regular coffee powder to the butter and cream.
For peppermint flavor: Whisk 1/2 tsp. peppermint extract into the frosting before adding the confectioners' sugar.
For tangerine flavor: Whisk 1 Tbs. grated tangerine zest into the frosting before adding the confectioners' sugar