Homemade Whipped Cream for Serving
I kept the watermelon cake completely unfrosted and served whipped cream separately. This allowed the fruit to remain bright and fresh while giving everyone the option to add a spoonful of cream to their slice.
To make a simple homemade whipped cream, beat the following ingredients together until soft or medium peaks form:
Keep the whipped cream refrigerated until serving.
Amanda’s Tips
Dry Everything Thoroughly
The watermelon and decorative fruit must be dry. Moisture makes it more difficult for the tiers and decorations to remain secure.
Use Watermelons in Different Sizes
Choosing one large watermelon and one smaller watermelon will make the finished cake look naturally tiered and balanced.
Trim Slowly
It is easier to remove more watermelon than it is to repair a tier that has been trimmed too narrowly. Cut away the rind gradually and rotate the watermelon as you work.
Assemble It on the Serving Stand
Once the watermelon is decorated, it becomes heavy and difficult to move. Stack and decorate the tiers directly on the cake stand or platter you plan to use.
Keep It Chilled
Watermelon tastes best cold and will hold its shape more reliably when chilled.
Remove Every Toothpick Before Serving
Keep track of where the toothpicks are inserted and remove all of them before slicing or serving the fruit.
Prepare Fruit Safely for Children
Whole grapes and some berries can be choking hazards for babies and young children. Remove all toothpicks and skewers, then cut the fruit into developmentally appropriate pieces before serving. Always supervise young children while they eat.
How Far Ahead Can You Make a Watermelon Cake?
The watermelon tiers can be trimmed several hours before decorating.
After trimming, pat them dry, wrap them gently, and refrigerate them separately. Prepare and dry the decorative fruit at the same time.
For the best presentation, stack and decorate the cake two to four hours before serving. Watermelon naturally releases moisture, so I would not fully assemble it the night before.
How to Store Leftovers
Remove all toothpicks and skewers before storing leftovers.
Cut the remaining watermelon into slices or cubes and transfer it to an airtight container. Store it in the refrigerator for up to three days.
Store the whipped cream separately in a covered container in the refrigerator.
The cake will not retain its original tiered appearance after it has been sliced, but the leftover fruit is perfect for snacks, smoothies, fruit salad, or breakfast.
Watermelon Cake Decorating Variations
Red, White, and Blue Watermelon Cake
Decorate with strawberries, raspberries, blueberries, and whipped cream on the side for a Fourth of July celebration.
Pastel Baby Shower Cake
Use pale green grapes, strawberries, raspberries, and small mint leaves for a soft garden-inspired presentation.
Tropical Watermelon Cake
Decorate with mango, kiwi, pineapple, grapes, and toasted coconut.
Farmers Market Watermelon Cake
Use whatever berries, stone fruit, grapes, and herbs look best at your local farmers market that week.
One-Tier Watermelon Cake
For a smaller gathering, use one watermelon and create a single short cake tier. Decorate the top and sides using the same method.
What to Serve with Watermelon Cake
This fresh fruit cake works especially well as part of a summer brunch or outdoor gathering. Serve it alongside:
For more seasonal inspiration, you may also enjoy my Blueberry Peach Streusel Bread, Blueberry Pie Overnight Oats, Peach Cobbler Overnight Oats, and Iced Cherry Cobbler Latte.
Frequently Asked Questions
Can I make a watermelon cake the night before?
You can trim the watermelon and prepare the fruit the night before, but I recommend stacking and decorating it on the day you plan to serve it.
How do I keep the watermelon tiers from sliding?
Dry both tiers thoroughly and keep them chilled. Long wooden skewers may be inserted through the center for additional support, but they must be removed before slicing.
Do I need to frost a watermelon cake?
No. This version is intentionally left unfrosted. Whipped cream is served on the side so guests can add it to individual portions.
Can I use other fruit?
Yes. Blackberries, kiwi, peaches, pineapple, mango, and cherries can all be used. Choose fruit that is firm enough to hold its shape.
How long can watermelon cake sit outside?
On a warm day, keep it outdoors only while serving. Return any leftovers to the refrigerator as soon as possible.
Can I make this as a smash cake?
A small watermelon tier can be used as a fresh-fruit celebration cake, but all toothpicks and skewers must be removed first. Fruit should be prepared appropriately for the child’s age and eating abilities.
Can I transport a watermelon cake?
It is safest to transport the trimmed tiers and decorative fruit separately, then assemble the cake at your destination. A completed two-tier watermelon cake is heavy and can shift during transportation.
How do I slice a watermelon cake?
First remove all decorative toothpicks and support skewers. Lift off the top tier and slice each tier separately into wedges or smaller pieces.
A Note From Amanda
I love finding small ways to make ordinary moments feel worth celebrating.
This watermelon cake was created for our daughter’s eight-month milestone and inspired by the colorful fruit outfit she wore for her monthly photos. It was a little different from the cakes I usually make for her, but that is part of what made it so memorable.
The finished cake was simple, seasonal, and filled with everything that feels like August. It reminded me that traditions do not need to look exactly the same each time to remain meaningful.
Sometimes the sweetest memories begin with two watermelons, a table covered in fruit, and another reason to gather the people you love.
Printable Watermelon Fruit Cake Recipe
Whether you are making this for a summer birthday, baby milestone, shower, backyard gathering, or family brunch, I have included the complete printable recipe below.
It includes the exact fruit I used, simple step-by-step instructions, and my best tips for building and decorating a two-tier watermelon cake.