Caramel Apple Salad
["1 egg", "1 c. powdered sugar", "1/2 c. butter, at room temperature", "8 oz. Cool Whip, thawed", "6 to 7 oz. can crushed pineapple, drained", "1 1/2 c. Granny Smith apples, chunked", "chopped walnuts (optional)"]
["Mix butter, powdered sugar and egg.", "Fold in Cool Whip, pineapple and apple chunks.", "Refrigerate before serving."]
["egg", "powdered sugar", "butter", "pineapple", "apples", "walnuts"]