recipe for watermelon cake

The first time I tasted watermelon cake, I was at a midsummer potluck with my kids running wild under sprinklers, the smell of grilled corn in the air. My neighbor brought out this beautiful layered “cake” that turned heads — bright pink watermelon “sponge,” whipped cream “frosting,” and juicy blueberries topping it all off.

Remember it later

Planning to try this recipe soon? Pin it for a quick find later!

PIN IT NOW!

SAVE THIS!

I thought it was an actual cake at first, but the first bite proved it was so much more refreshing. That moment was my introduction to the magic of a recipe for watermelon cake, and I’ve been hooked ever since.

What makes this dish so special is how quickly it goes from a plain watermelon to a show-stopping centerpiece. It’s the kind of treat that’s both ridiculously easy to assemble and healthy enough to enjoy without a second thought. Plus, when you cut into it, it holds together just like a traditional cake — only it’s cool, crisp, and juicy, perfect for hot days.

Since that summer, this watermelon cake recipe has become a must for family BBQs and birthdays alike. It’s fun, light, and incredibly satisfying — and honestly, it’s the one dessert that always disappears first from the table. I’ve shared this recipe for watermelon cake with friends who follow dairy-free and vegan lifestyles, and it’s easily adaptable for any diet. Whether you’re looking to impress or simply want a guilt-free dessert that screams summer, this recipe checks all the boxes.

At DinnerFlare, I’m always looking to blend classic comfort with creative twists, and this one hits the sweet spot. You’ll soon see why a recipe for watermelon cake belongs in your warm-weather recipe rotation.

Next, we’ll cover the fresh ingredients and why this cake is as nourishing as it is gorgeous.

Simple Ingredients, Stunning Results

What is a watermelon cake made of?

SAVE THIS!

You might think a recipe for watermelon cake requires some baking magic, but the beauty lies in its simplicity. The base? A thick, round slice of ripe seedless watermelon. That’s it. No flour, no oven, just fresh fruit sliced into a cake-like shape. From there, the toppings are where the creativity shines.

Traditional versions use whipped cream or Greek yogurt as “frosting.” But if you’re going dairy-free or vegan, coconut whipped cream is an easy substitute that’s just as delicious and even more fragrant. For decoration, think berries like blueberries, raspberries, and sliced strawberries — they add color and sweetness while keeping everything light.

Crushed pistachios, slivered almonds, shredded coconut, and even edible flowers can be sprinkled around the top or sides for a gourmet touch. Want to go extra? Use a melon baller to scoop cantaloupe or honeydew into spheres and arrange them on top like a crown. This recipe for watermelon cake is more about layering flavor and texture than following strict measurements.

You can also check out my summer-friendly Berry Smoothie Bowl recipe and this fruit kabob idea for parties that pairs perfectly with your cake for a fruity spread.

Nutrition & health benefits

Is watermelon cake healthy and low-calorie? You bet. The core of this cake — fresh watermelon — is packed with hydration, vitamins A and C, and antioxidants like lycopene. It’s naturally low in calories, which means you can enjoy a generous slice without second-guessing it. Even with a whipped topping, it’s still lighter than most desserts.

Plus, watermelon is 92% water, making it incredibly hydrating. On hot days or post-workout, a chilled slice feels both indulgent and restorative. For added fiber and healthy fats, top it with nuts or chia seeds. If you’re watching your sugar intake, skip sweetened yogurt and use unsweetened coconut cream.

As with my vegan mango chia pudding, this recipe proves that you don’t have to compromise flavor to eat clean.

Up next, I’ll show you how to decorate a watermelon cake like a pro — no piping bags or pastry school required.

Decorating a Watermelon Cake Like a Pro

How do you decorate a watermelon cake?

SAVE THIS!

One of the most exciting parts of following a recipe for watermelon cake is the decorating. You don’t need fondant or frosting bags — just fresh ingredients and a little imagination. After trimming your watermelon into a cylindrical “cake,” gently pat it dry with paper towels. This helps your topping (like coconut whipped cream or yogurt) stick better.

Spread your topping evenly around the sides and top, just like you would with a frosted cake. Don’t worry about perfection — rustic is part of the charm! Then, press sliced almonds, crushed pistachios, or shredded coconut onto the sides to create a textured “crust.” Arrange your fruit artfully on top — try layering sliced strawberries, fanning out kiwi slices, or creating a flower shape with blueberries and blackberries.

For extra flair, drizzle a bit of honey (or maple syrup for a vegan twist), or place edible flowers for a garden-party look. This is also where you can get the kids involved — it’s like edible arts and crafts!

I often pair this decorating session with recipes from my no-bake dessert collection — it turns into a fun kitchen afternoon.

Occasions and themes

One of the best things about a recipe for watermelon cake is how easily it adapts to different occasions. Planning a birthday for a health-conscious friend? Add candles and layer with tropical fruit. Hosting a brunch or baby shower? Decorate with pastel fruits like golden kiwi and raspberries.

For the Fourth of July, think blueberries, strawberries, and coconut for a patriotic theme. Hosting a kids’ party? Create faces or animals with fruit shapes — cookie cutters work wonders here.

I’ve even used this recipe for a bridal shower alongside these whipped berry parfaits — light, celebratory, and totally Instagram-worthy.

Whether you’re dressing it up or keeping it casual, this watermelon cake always fits the mood — and steals the spotlight.

SAVE THIS!

Variations & Dietary Adaptations

Can I make a vegan or dairy-free version of watermelon cake?

Absolutely! One of the reasons I love this recipe for watermelon cake is its versatility — especially for special diets. For a vegan or dairy-free version, just swap out traditional whipped cream or yogurt for coconut whipped cream. It’s creamy, fluffy, and adds a subtle tropical flavor that complements the watermelon perfectly.

To make coconut whipped cream, refrigerate a can of full-fat coconut milk overnight. Scoop out the solidified cream and whip it with a little vanilla extract and maple syrup. It’s naturally sweet and holds its shape beautifully on chilled watermelon.

If you’re going sugar-free, stick to unsweetened dairy-free yogurt or use almond-based options. For nut-free diets, try oat milk yogurt or aquafaba-based whipped toppings.

Like my vegan banana oat bars, this dessert is proof that indulgence and inclusivity go hand-in-hand.

Fun twists to try

Once you’ve mastered the base recipe for watermelon cake, there are so many fun ways to change it up. Try making mini watermelon cakes using round cookie cutters — perfect for parties or kids’ snacks. Or build a two-tiered cake by stacking smaller rounds of watermelon — just be sure to cut your base thick enough for stability.

Looking for something frozen? Dip watermelon wedges in coconut cream, roll them in shredded coconut or crushed nuts, then freeze. They’re refreshing and perfect for hot afternoons.

Another great idea is turning the cake into fruit kabobs or layered parfaits using chopped watermelon and toppings in clear cups — perfect for serving at events.

For more fruity dessert ideas, check out my frozen berry yogurt bark and summer salad bowls — both ideal companions to this recipe.

Whether you’re customizing for taste, dietary needs, or creative flair, this watermelon cake keeps things fresh — literally and figuratively.

FAQs

What is a watermelon cake made of?
A watermelon cake starts with a thick, round slice of seedless watermelon trimmed into a cake shape. It’s topped with whipped cream, yogurt, or coconut cream and decorated with fruits, nuts, and toppings of your choice.

How do you decorate a watermelon cake?
Decorate it by spreading your chosen topping, then layering sliced fruits like kiwi, berries, and melon balls. Add texture with almonds, coconut, or granola, and top with edible flowers or mint leaves for elegance.

Is watermelon cake healthy and low-calorie?
Yes! Watermelon is naturally low-calorie and packed with hydration, antioxidants, and vitamins. When topped with coconut cream or unsweetened yogurt and fresh fruit, it stays light and nutritious.

Can I make a vegan or dairy-free version of watermelon cake?
Yes — use coconut whipped cream, almond-based yogurt, or other plant-based toppings to make it fully vegan and dairy-free.

Conclusion

A recipe for watermelon cake is more than a trendy treat — it’s a refreshing, guilt-free, and absolutely gorgeous dessert that fits any occasion. Whether you’re planning a party, looking for a healthy dessert, or just want a fun way to enjoy fruit, this recipe checks every box. It’s easy to customize, quick to prepare, and always makes an impression.

So next time you’re staring down a giant watermelon in your fridge, grab a knife and turn it into something unforgettable. With a few toppings and your personal touch, you’ll create a dessert that’s just as joyful to make as it is to share.

Craving more delicious recipes?
Follow us on Pinterest for fresh, easy dinners and creative meal ideas:
👉 pinterest.com/dinnerscoop

Print