- 1 cup peanut butter
- 1/2 cup vegetable shortening
- 1 teaspoon vanilla extract
- 2 1/2 cups confectioners' sugar
- 1/4 cup soy milk, or more as needed
- Whip peanut butter, shortening, and vanilla together in a mixing bowl until well blended. Add powdered sugar and soy milk; mix until light and fluffy. If mixture is too thick, add 1 tablespoon soy milk at a time until creamy and spreadable.