Photo: Hector Sanchez; Styling: Heather Chadduck Hillegas
Makes 4 1/2 cups
Beat butter at medium speed with an electric mixer 1 minute. Gradually add powdered sugar alternately with 5 Tbsp. buttermilk. Beat at low speed until blended. Stir in lemon juice, vanilla, and salt. If desired, add up to 3 Tbsp. buttermilk, 1 Tbsp. at a time; beat to desired consistency.