How to Make It
Preheat oven to 350°.
Combine first 6 ingredients in a bowl. Combine sugars, oil, and eggs in a separate bowl, stirring with a whisk. Stir carrot, zucchini, and pineapple into sugar mixture. Add flour mixture to sugar mixture; stir until moistened. Spoon batter into a 13 x 9-inch metal baking pan coated with cooking spray. Bake at 350° for 33 minutes or until done. Cool on a wire rack.
Combine cream cheese and butter in a bowl; beat with a mixer until smooth. Add powdered sugar; beat just until smooth. Spread evenly over top of cake. Sprinkle with coconut flakes. Cut into 16 pieces.