- 1 1/2 cups confectioners' sugar
- 1 cup peanut butter
- 6 tablespoons butter, melted
- 1/4 cup milk
- 1 teaspoon vanilla extract
- Combine confectioners' sugar, peanut butter, melted butter, milk, and vanilla extract in a large bowl. Mix with a wooden spoon until well-combined and smooth, 2 to 3 minutes.