Sour Cream Frosting
["1 (6 oz.) pkg. semi-sweet or milk chocolate pieces", "1/4 c. butter", "1/4 c. sour cream", "1 tsp. vanilla", "1/4 tsp. salt", "2 1/2 to 2 3/4 c. sifted powdered sugar"]
["Melt chocolate and butter; cool slightly.", "Blend in sour cream, vanilla and salt.", "Slowly beat in sugar until spreading consistency."]
["semi-sweet", "butter", "sour cream", "vanilla", "salt", "powdered sugar"]