Name: Strawberry Watermelon Smoothie (3 Ingredients!)
Prep time: 5 min
Total time: 5 min
Cuisine: Healthy
Ingredients: 3 cups frozen strawberries; 3 cups cubed watermelon; 1 banana (room temperature)

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This strawberry watermelon smoothie is full of juicy flavor! This 3-ingredient recipe is a deliciously healthy treat.

Here’s a smoothie recipe that’s so simple and so utterly delicious, it’s jumped to the top of our favorite smoothie recipes. Try this Strawberry Watermelon Smoothie! It’s sweet and delicious, with just the right juicy flavor with no added sweetener. It’s a great snack or even works as a healthy dessert after a summer meal: it’s just that good! Our 4 year old could not stop sipping it, and neither could we. As authors of over 50 smoothie recipes, we know you’ll love this simple drink.

Ingredients for a strawberry watermelon smoothie

This strawberry watermelon smoothie requires only 3 ingredients, the least amount of any of our smoothie recipes. But it’s one of the top in terms of flavor! There’s something about the melon and berry combination that’s pure summer. This one has a bit of nostalgia for me: it’s a spin on my favorite smoothie at the mall growing up in the 1990’s. Turns out it’s even tastier than the inspiration. Here’s what you’ll need:

Frozen strawberries: The frozen berries bring in sweetness and an icy texture. We don’t recommend using fresh strawberries, since the frozen are integral for the texture here.
Watermelon: Don’t make this smoothie recipe unless you have access to ripe, in season watermelon.
Banana: A room temperature banana combines to make the perfect creamy texture and accentuates the sweetness. Make sure it’s a ripe banana for best results!

Simply throw them in the blender and puree it up. It makes the perfect sweet tart, fruity flavor! If some of the fruit isn’t perfectly ripe, you can compensate for the sweetness by adding a bit of honey or maple syrup.

Find a ripe watermelon!

The most important advice for this smoothie is to make sure the watermelon is ripe. It’s not worth making this smoothie with out of season watermelon, which can be tart and tasteless. Here are a few tips for when you’re shopping for melon:

Shop in watermelon season. If it’s out of season, it’s much more likely to be unripe.
Look for a yellow field spot. Most watermelons should have a patch on the bottom, which is where they were resting on the ground before being picked. If the patch is yellow, the watermelon is ripe (if it’s white, it’s unripe).

Protein adders for this strawberry watermelon smoothie

One thing to note about this strawberry watermelon smoothie: it’s just fruit, so it doesn’t have protein. That means it’s best served as a treat or a way to drink your vitamins, not as a meal replacement. But if you’d like to add protein, you can feel free! Protein makes it filling and more suitable for drinking as a snack or breakfast. Here are a few protein adders:

Chia seeds. Add plant-based protein and fiber with chia seeds! 2 tablespoons chia seeds adds 4 grams protein and 11 grams fiber (see this Chia Seed Smoothie).
Protein powder: Use a high quality vanilla protein powder (some notes on buying a good brand are in this energy balls article).
Almond butter or cashew butter. 1 tablespoon nut butter adds 4 grams protein. This does compete with the flavor a bit here and dulls the color of this smoothie.

Flavor variations

Want to mix up this strawberry watermelon smoothie to have different flavor variations? Here are a few things to change or add to make a whole new flavor combination:

Mint or basil: Add a handful of mint or basil leaves for an herby variation.
Blueberry: Swap in 2 cups frozen blueberries to make a Blueberry Watermelon Smoothie.
Raspberry: Use 1 cup frozen raspberries and 1 cup strawberries for Strawberry Raspberry Watermelon Smoothie.
Strawberry blueberry: Use 1 cup each frozen blueberries and strawberries in place of the berries.
Mango: Use 2 cups frozen mango for a Mango Watermelon Smoothie.
Pineapple: Use 2 cups frozen pineapple for a Pineapple Watermelon Smoothie.

And that’s it! Let us know what you think of this smoothie recipe in the comments below. It’s one of our favorite summer drinks because of its big, bold flavor!