Watermelon Smoothie
Here’s the honest truth about watermelon smoothies: most of them come out watery.
Watermelon is basically water with flavor, so if you just throw it in a blender with more liquid, you get something thin, sad, and prone to separating in the glass while you’re still drinking it.
The fix is almost embarrassingly simple, and it’s the whole reason this one works: use frozen watermelon and add a banana.
That’s it. Frozen fruit gives you body and cold without watering anything down, and banana adds the creamy thickness that makes a smoothie feel like an actual thing you’re eating instead of pink juice.
So if you’ve tried a watermelon smoothie before and been underwhelmed, you weren’t doing it wrong — you were just missing the two ingredients that hold the whole thing together.
Five minutes and a blender, and you’ve got a genuinely good one.
Got more watermelon than you know what to do with? This is just one option — see more ideas for using up leftover watermelon here →
Why This Watermelon Smoothie Actually Works
Three small decisions do all the heavy lifting here:
- Frozen watermelon instead of fresh. This is the big one. Frozen cubes chill and thicken the smoothie at the same time, so you don’t need ice (which waters it down) or a pile of extra fruit to compensate.
- Banana for body. Banana is what turns thin into creamy. It also adds natural sweetness, so you usually won’t need any added sugar at all.
- Just a splash of liquid. Most watery smoothies are simply over-liquided. Start with a little, blend, and add more only if you need it.
If you froze watermelon earlier this summer, this is one of the easiest things to make with it — and one more reason freezing extra watermelon is worth doing instead of letting it go soft in the fridge.
Ingredients
Three core ingredients, plus whatever extras you’re in the mood for. Here’s what each one does:
Frozen watermelon
About 2 cups of frozen cubes. This is the base and the reason the smoothie stays thick and cold without ice. Freeze your own or use fresh plus a small handful of ice in a pinch.
Frozen banana
1 banana, previously peeled, sliced, and frozen. This is the creaminess and most of the sweetness — don’t skip it if you want a smoothie rather than a slushie.
Liquid of choice
About ½ cup to start. Milk (dairy or plant), coconut water, or a splash of juice all work. Start low and add more only to loosen it.
Greek yogurt (optional)
A couple of spoonfuls for extra creaminess and a little protein, if you want it to hold you longer.
Fresh lime or mint (optional)
A squeeze of lime or a few mint leaves keeps the flavor bright instead of flat.
Honey or a pitted date (optional)
Only if your watermelon and banana didn’t bring enough sweetness on their own. Usually they do.
How To Make a Watermelon Smoothie
The whole thing is one step repeated until it’s smooth:
- Add the frozen watermelon and banana to your blender.
- Pour in about half your liquid — less than you think you need.
- Blend, stopping to scrape down the sides or add a splash more liquid if it’s too thick to move.
- Taste and adjust. Add yogurt for creaminess, lime for brightness, or a touch of honey for sweetness.
- Pour and drink right away, while it’s cold and thick.
Start to finish, you’re looking at about five minutes.
The Trick To a Thick Smoothie (Not a Watery One)
If your watermelon smoothie ever turns thin or separates, it’s almost always one of these:
- You used fresh watermelon and ice instead of frozen fruit. Frozen fruit is what gives real body. Ice just dilutes.
- You added too much liquid up front. Always start with less and add more slowly — you can loosen a thick smoothie, but you can’t un-water a thin one.
- You skipped the banana (or another creamy add-in). Watermelon alone has nothing to hold it together. Banana, yogurt, or even a spoonful of nut butter gives it structure.
Get those three right and separation basically stops being a problem.
Variations
Once you’ve got the base down, it’s easy to send it in different directions:
- Watermelon banana smoothie — the classic, and honestly the best starting point. The banana is already doing the work.
- Watermelon smoothie with yogurt — add a scoop of Greek yogurt for a creamier, higher-protein version that works as breakfast.
- Watermelon smoothie with milk — use dairy or a plant milk as your liquid for something richer and more filling.
- Watermelon berry smoothie — a handful of frozen strawberries or raspberries pairs beautifully and deepens the color.
- Watermelon mint smoothie — a few mint leaves make it taste spa-level refreshing.
- Protein version — add a scoop of your usual protein powder or collagen to turn it into a post-workout drink.
What Fruit Goes Well With Watermelon?
If you want to build your own version, watermelon plays best with:
- Banana — for creaminess and body (the MVP here).
- Strawberry and other berries — for color and a little tang.
- Pineapple or mango — for a tropical, sweeter smoothie.
- Cucumber — if you want to lean hydrating and light rather than sweet, the same idea behind my watermelon cucumber juice.
A squeeze of lime and a few mint leaves work with any of these.
Can You Put Watermelon In a Smoothie?
Yes — and it’s a great smoothie ingredient as long as you set it up right.
The only catch is watermelon’s high water content, which is exactly what the frozen fruit and banana solve.
Frozen watermelon blends into a thick, naturally sweet base; it’s fresh watermelon plus ice that tends to disappoint. So the answer is a confident yes, with one small rule: freeze it first.
Is a Watermelon Smoothie Good For You?
For something that tastes like dessert, it holds up well.
Watermelon is around 92% water and brings vitamins A and C plus lycopene, and blending it with banana and yogurt adds fiber and a little protein — so it’s genuinely satisfying rather than just sweet.
People often search for watermelon smoothies as a lighter option, and it can be a good one: made with whole fruit and a sensible amount of liquid, it’s naturally lower in calories than most blended drinks and keeps you hydrated on hot days.
Skip the added sweetener when your fruit is ripe, and add yogurt or protein if you want it to actually hold you until your next meal. It’s not a magic drink — it’s just a genuinely good one that happens to be mostly fruit and water.
Make Ahead And Storage
Smoothies are best the moment they’re blended, but you’ve got options:
- Freezer smoothie packs: portion the frozen watermelon and banana into bags ahead of time, then dump a bag straight into the blender with liquid when you want one. This is the real time-saver.
- Short-term: a made smoothie keeps in the fridge for up to a day in a sealed jar. Expect some separation — just shake or stir before drinking.
Watermelon Smoothie
A thick, creamy watermelon smoothie made with frozen watermelon and banana — no watery texture, no ice needed. Ready in 5 minutes.
- Prep Time: 5 minutes
- Total Time: 5 minutes
- Yield: 1 large or 2 small smoothies
- Category: Breakfast, Drinks
- Method: Blender
Ingredients
- 2 cups frozen cubed watermelon
- 1 frozen banana
- ½ cup milk (dairy or plant), coconut water, or juice, plus more as needed
- 2 tablespoons Greek yogurt (optional)
- Squeeze of fresh lime or a few mint leaves (optional)
- Honey or 1 pitted date, to taste (optional)
Instructions
- Add the frozen watermelon and frozen banana to a blender.
- Pour in half the liquid to start.
- Blend until smooth, scraping down the sides and adding a splash more liquid only if needed.
- Taste and adjust with yogurt, lime, or sweetener.
- Pour and serve immediately.
Notes
- Frozen fruit is essential for a thick, non-watery smoothie — don’t swap in fresh watermelon plus ice.
- Make freezer smoothie packs (watermelon + banana portioned in bags) for grab-and-blend mornings.
- Add a scoop of protein powder or collagen to make it more filling.
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