High-Protein Watermelon Smoothie with Yogurt

🔍 Quick Look: Watermelon Smoothie

• ⏱️ Prep Time: 5 minutes
• 👥 Servings: 2
• 📊 Calories: ~317 kcal (based on nutrition panel)
• 👩🏽‍🍳 Flavor Profile: Light, creamy, and naturally sweet with the refreshing flavor of ripe watermelon and fresh mint.
• 💪🏼 Nutrition: 24 grams of protein, 5 grams of fiber, 160mg calcium
• ⭐ Difficulty: Simply blend the ingredients until smooth. Freezing the watermelon ahead of time creates the thickest, creamiest smoothie.

👩🏽‍⚕️ Dietitian's Note

Most watermelon smoothies are made with fruit alone, which means they digest quickly and may not keep you full for long. Adding Greek-style yogurt, hemp hearts, flaxseed, and optional chia seeds increases the protein, fiber, and healthy fats, making this a more balanced smoothie that provides longer-lasting energy.

Watermelon is also a source of vitamin C and lycopene, an antioxidant that gives watermelon its vibrant red color and may help protect skin and cells from oxidative stress.

👩🏼‍🌾 Ingredients

Below, I share ingredient notes from both a nutrition expert's and trained chef's perspective.

• Watermelon: Frozen watermelon cubes create the thickest smoothie and the best flavor. If using fresh watermelon, you may want to add a handful of ice.
• Greek-Style Yogurt: Adds creaminess and protein. Use dairy or plant-based yogurt.
• Unsweetened Nondairy Milk: Soy milk adds a little extra protein while helping the smoothie blend smoothly.
• Hemp Hearts: A mild-flavored way to add protein and healthy unsaturated fats.
• Ground Flaxseed: Adds fiber and plant omega-3 fats.
• Chia Seeds: Optional, but they make the smoothie slightly thicker and add even more fiber.
• Fresh Mint: Adds a cool, fresh flavor that pairs naturally with watermelon.
• Date (optional): Naturally sweet and rich in fiber, potassium, and antioxidants that support digestion and provide long-lasting energy without added sugar.

See the printable recipe card below for quantities.

🍉 Substitutions

• Frozen banana: Add half a frozen banana instead of dates for a thicker texture and natural sweetness.
• Ice cubes: Add 2 to 4 cubes for a frostier texture without adding calories.
• Yogurt: Use Greek-style yogurt for extra protein. For a nondairy version, go vegan with high-protein options like soy or pea protein-based Greek-style yogurt (e.g., Kite Hill).
• Milk: Any unsweetened plant milk works. Soy milk adds more protein, while almond or oat milk gives a lighter feel.

🍃 How to Pick a Good Watermelon

Choose a watermelon that:

• Sounds hollow when tapped
• Feels heavy for its size
• Has a creamy yellow field spot
• Has a dull, matte rind rather than a shiny one

🧊 Should You Freeze Watermelon for Smoothies?

Yes. Watermelon contains so much water that fresh cubes produce a much thinner smoothie. Frozen watermelon creates a thick, creamy texture without diluting the flavor with ice.

To freeze watermelon, spread the cubes in a single layer on a parchment-lined baking sheet until frozen. Transfer to a freezer-safe bag and store for up to 3 months.

🔪 How to Cut a Watermelon

Watermelon contains so much water that freezing cubes as follows produces a much thicker smoothie:

• Slice the watermelon in half.
• Place one half cut-side down on a cutting board.
• Cut vertically and horizontally through the flesh to create a grid.
• Lift out the watermelon sticks and cut into cubes.
• Freeze the cubes if making smoothies.

🫙 More Smoothie Recipes

My Juice with Chia Seeds is one of the easiest ways to stay hydrated on hot summer days.

Try my Blueberry Mango Smoothie skips the banana to preserve the most antioxidants from the berries while delivering amazing flavor!

This healthy protein smoothie is loaded with whole-food ingredients that provide a satisfying boost of protein, fiber, and antioxidants.

⚖️ Convert the Recipe to Metric (g & mL)

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