Filling for Mello Yello Cake By Momof4luvscakes recipe Comments | 0 Favorites | 17 Good filling for the Mello Yello Cake. Filling for Mello Yello Cake Ingredients 1 cup flaked coconut1 cup pecans1 (20oz.) crushed pineapple, drained and liquid reserved1 small can crushed pineapple, drained and liquid reserved2 cups sugar5 tablespoons flour1 1/2 sticks butter Instructions Mix pineapple juice, sugar, and flour and simmer until thick. Remove from heat and add butter, coconut, pecans, and pineapple. Mix and spread on cake.