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JELL-O® 'Dive-on-In' Cake

"This cake decorated like a pool party will make a big splash at your next event."
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4 h 15 m servings
Original recipe yields 15 servings

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  • Ready In

  1. Prepare and bake cake mix in 13x9-inch baking pan as directed on package. Cool completely. Invert cake onto large platter; remove pan. Using a serrated knife, cut and scoop out a shallow rectangle from center of cake, leaving a 2-inch border of cake on all sides and a thin layer of cake on the bottom. Reserve removed cake for snacking or other use.
  2. Stir boiling water into dry gelatin mix in large bowl at least 2 min. until completely dissolved. Stir in cold water. Refrigerate 1-1/4 hours or until slightly thickened (consistency of unbeaten egg whites). (Or, see Tip below for quicker set method.) Pour thickened gelatin into center of cake. Refrigerate 3 hours or until set.
  3. Frost borders of cake with whipped topping. Decorate with remaining ingredients as desired to resemble a swimming pool. Store leftover cake in refrigerator.


  • Fun Idea
  • Insert bite-size fish-shaped and octopus-shaped chewy fruit snacks into gelatin 'pool' before refrigerating for an added treat!
  • Shortcut
  • For a quick-set gelatin, simply add 4 cups ice cubes to the dissolved gelatin mixture in place of the 1 cup cold water; stir 8 min. or until gelatin begins to thicken (spoon drawn through leaves a definite impression). Remove any unmelted ice. Pour thickened gelatin into center of cake; continue as directed.


Read all reviews 5
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This makes such an adorable cake, and you can use any flavors you like for the cake & pool. I used a white cake and made a 2 layer rectangular cake. I placed the first layer on my platter, the...

Living in south Louisiana, we thought it would be appropriate to make it a beach and add chocolate chips to the graham craker/brown sugar "sand" and call it 'Life's a beach and Then You Get Tarb...

It looked awesome, but the taste wasn't so great!

I had so much fun making this cake! I decided to make this an 'ocean cake' instead of a pool cake. I did the quick set with the jell-o and it worked great. I also used crushed graham crackers...

Made this for my daughter about 5 years ago for her birthday pool party. She requested it again this year for her birthday.