Ingredients

3 ounces (6 tablespoons) unsalted butter, softened 

1 cup confectioners' sugar 

1 1/2 ounces (1/2 cup) walnuts, toasted and finely chopped 

Pinch of salt 

5 ounces semisweet chocolate, melted and slightly cooled 

Preparation

Cream butter and sugar on medium speed until light and fluffy. Beat in walnuts and salt until combined. Beat in chocolate. Use immediately.