Preheat oven to 350F. Blend all ingredients (except coconut) in large mixing bowl. Beat 4 minutes at medium speed. Add coconut. Pour into greased 9 x 12 inch baking pan. Bake 30-40 minutes or until cake springs back when lightly pressed. Do not over bake. Cool in pan 15 minutes.
Blend pineapple, pudding mix and rum flavoring. Spread on cooled cake. Add layer of Cool Whip.
Cajun Country -- New Iberia, Louisiana