Sift together the flour, sugar, baking powder, and shortening. Blend in the shortening and cherry juice; stir in cherries and milk; beat on medium speed of electric mixer for 2 minutes. Add egg whites; beat 2 minutes longer. Fold in the chopped pecans. Pour batter into 2 greased and floured 8-inch layer cake pans or a 13x9x2-inch rectangular pan. Bake at 350° for 30 to 35 minutes. Frost with Fluffy frosting and garnish with cherries or chopped nuts.