*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9x13-inch baking dish.
Beat butter in a bowl using an electric mixer until light and fluffy. Add cake mix, eggs, and water; mix until batter is just combined. Stir pineapple and bananas into batter. Fold pecans and coconut into batter; pour into the prepared baking dish.
Bake in the preheated oven until a toothpick inserted in the center of the cake comes out clean, 35 to 45 minutes. Cool cake in the dish for 10 minutes before turning onto a wire rack to cool completely, about 30 minutes.