Pineapple Chiffon Cake with Pineapple Frosting

Directions

1. Preheat oven to 325°. In a large bowl, combine the flour, sugar, baking powder and salt. In another bowl, whisk the egg yolks, pineapple juice, oil and vanilla; add to dry ingredients. Beat until well blended. In another bowl, beat egg whites and cream of tartar until stiff peaks form; fold into batter.
2. Spoon into an ungreased 10-in. tube pan. Bake until top springs back when lightly touched, 50-55 minutes. Immediately invert cake onto a wire rack; cool completely. Remove cake to a serving platter.
3. In a large bowl, cream the butter and confectioners' sugar, about 5 minutes. Add vanilla and stir in pineapple. Frost cake. Store in the refrigerator.