Frozen Watermelon Basil Bourbon Slush

When the temperature hits 90 degrees and your guests are fanning themselves on the back porch, this watermelon bourbon slush is what you make. Frozen watermelon gets blistered in a blender with good bourbon, a handful of fresh basil, and a squeeze of lime. The result is a slushy, herbaceous cocktail that tastes like July in a glass. No simple syrup, no fancy equipment, no waiting. Cube the watermelon the night before, freeze it solid, and you are 10 minutes away from the best summer drink on the block.

Why You’ll Love This Watermelon Bourbon Slush

• Why You’ll Love This Watermelon Bourbon Slush

• This watermelon bourbon slush is the cocktail that disappears first at every cookout. Here is why it keeps ending up in my blender:

• • 10 minutes, start to finish — if the watermelon is already frozen, you are blending and pouring in under 10 minutes.
  • No added sugar — ripe watermelon brings enough natural sweetness on its own. No simple syrup needed.
  • Basil makes it interesting — the herbal note keeps this from tasting like a juice box. It is the ingredient people always ask about.
  • Scales for a crowd — one batch makes 4 servings. Double it for 8. The blender does the work.
  • Bourbon-forward but not boozy — 2 oz per drink is enough to taste the whiskey without overwhelming the fruit.
  • Kid-friendly option — skip the bourbon, add extra lime and a splash of sparkling water. Everyone wins.

• Once you try this watermelon bourbon slush, it becomes the only summer drink you want to make on repeat.

Ingredients

• Ingredients

• Makes 4 servings. Everything goes in the blender.

• • 5 cups seedless watermelon, cubed and frozen solid (about half a small watermelon)
  • 8 oz bourbon (a mid-range blended bourbon works great here)
  • 2 oz fresh lime juice (about 2 limes)
  • 10-12 fresh basil leaves, plus extra for garnish
  • 1-2 tbsp honey or agave nectar (optional, only if your watermelon is not very sweet)
  • 1 cup ice
  • Pinch of flaky sea salt
  • Lime wheels and small watermelon wedges for garnish

• A few notes on what you are working with

• Watermelon: The riper the melon, the sweeter the slush. Look for a creamy yellow spot on one side — that means it ripened on the vine. Freeze the cubed watermelon on a parchment-lined sheet pan for at least 4 hours or overnight. This is the single most important step for texture.

• Bourbon: You do not need top-shelf here. A blended bourbon like Buffalo Trace, Maker’s Mark, or Evan Williams gives you the right balance of sweetness and oak without overpowering the fruit. Save the single barrel for sipping neat. For more on picking the right bottle, check out Serious Eats’ guide to best bourbons for cocktails.

• Basil: Genovese basil is the standard. Do not substitute dried — it will taste like dust in a drink. If you can find Thai basil, it adds a subtle anise note that works beautifully.

• Honey vs. agave: Honey adds a floral warmth. Agave keeps it neutral. Taste your watermelon before freezing. If it is very sweet, skip the sweetener entirely.

Equipment

• Equipment You’ll Need

• Minimal gear for this one:

• • Blender — a standard countertop blender works. A high-speed blender (like a Vitamix) gives you the smoothest texture in about 30 seconds.
  • Baking sheet and parchment paper — for freezing the watermelon cubes in a single layer so they do not clump.
  • Citrus juicer or reamer — fresh lime juice only. Bottled tastes flat next to the fresh watermelon.
  • Jigger or measuring cup — 8 oz of bourbon across 4 drinks keeps things consistent.
  • 4 rocks glasses or tumblers — wide-mouth glasses let you see the slush.

• If you need a blender upgrade, the Ninja Professional Plus handles frozen fruit without breaking a sweat and costs under $100.

How to Make Watermelon Bourbon Slush

Step 1

Step-by-Step Instructions

Total time: 10 minutes (plus 4+ hours freezing time for the watermelon).

Step 2

Cut the watermelon into 1-inch cubes, removing any seeds. Spread them in a single layer on a parchment-lined baking sheet. Freeze for at least 4 hours, or overnight. Frozen solid is what you want — if the cubes are even slightly soft, the slush will be watery. I usually prep two sheet pans on Sunday and keep a bag in the freezer all summer.

Step 3

Add the lime juice and basil leaves to the blender first. Pulse 3-4 times until the basil is broken into small green pieces. This releases the oils before the ice goes in, which distributes the flavor evenly. If you toss the basil in at the end, you get big leaf chunks that stick to the side of the glass.

Step 4

Pour in the bourbon. Add the frozen watermelon cubes and the cup of ice. Blend on high for 45-60 seconds until completely smooth. Stop and scrape down the sides once if needed. The consistency should be like a thick slushy — thick enough to hold its shape when you scoop it with a spoon.

Step 5

Taste the slush. If your watermelon was not very sweet, add 1-2 tablespoons of honey or agave and blend again for 10 seconds. Add the pinch of flaky sea salt — this is not optional. Salt amplifies the watermelon flavor and rounds out the bourbon. You will not taste salt. You will taste better watermelon.

Step 6

Divide among 4 glasses. Garnish each with a lime wheel, a small watermelon wedge, and 2-3 fresh basil leaves. Serve immediately with straws. The slush holds its texture for about 20 minutes before it starts to melt, so do not let it sit.

Pro Tips

Pro Tips for Best Results

Freeze the watermelon on a sheet pan, not in a bag. If you dump all the cubes into a bag raw, they freeze into one solid block. A sheet pan keeps them separate so they blend evenly.

Taste your watermelon before freezing. Cut a small piece and eat it. If it is sweet and flavorful, skip the added sweetener. If it is bland, plan to add honey. You cannot fix a watered-down slush after blending.

Do not skip the salt. A tiny pinch of flaky Maldon salt in the blender makes the watermelon taste more like watermelon and the bourbon taste smoother. This is the same trick that makes tomatoes taste better.

Chill your glasses in the freezer for 10 minutes before serving. This buys you an extra 5-10 minutes before the slush starts to melt in the glass.

Use a blended bourbon, not a high-rye mash bill. High-rye bourbons are spicy and can clash with the delicate watermelon. Blended bourbons are sweeter and rounder, which is what you want here.

Variations & Substitutions

Variations & Substitutions

Non-alcoholic version: Replace the bourbon with 8 oz of coconut water or sparkling water. Add an extra tablespoon of lime juice to keep the brightness. The basil and watermelon carry the drink.

Tequila swap: Blanco tequila works in place of bourbon for a lighter, more citrus-forward drink. This is basically a watermelon margarita with basil. If you love that combo, try our frozen watermelon margarita next.

Gin and basil: Swap the bourbon for a London dry gin like Tanqueray or Beefeater. Gin and basil are a classic pairing, and the botanicals play well with the watermelon.

Spicy version: Add 2-3 thin slices of jalapeño to the blender with the basil. Remove the seeds for mild heat, leave them in for serious kick.

Berry twist: Replace 1 cup of the watermelon with frozen strawberries. The color turns a deeper pink and the flavor gets more complex. See our frozen strawberry margarita for more berry-blender inspiration.

Maple instead of honey: If you prefer maple’s deeper sweetness, use 1 tablespoon of real maple syrup in place of honey. It pairs especially well with bourbon.

Storage & Reheating

Storage, Make-Ahead & Reheating

Make-ahead: Freeze the watermelon cubes up to 3 months in advance. Keep them in a zip-top bag with the air pressed out. Everything else comes together in 10 minutes when you are ready to serve.

Fridge: You can blend the full batch and store it in a pitcher in the fridge for up to 4 hours. It will separate — the watermelon sinks, the liquid rises. Stir vigorously or re-blend for 15 seconds before serving.

Freezer: Pour the blended slush into a freezer-safe container and freeze for up to 1 month. Let it sit at room temperature for 15-20 minutes before serving, then stir or re-blend to bring back the slushy texture. It will not be quite as smooth as fresh, but it still tastes great.

Do not microwave. There is no reheating step for a frozen cocktail. If it is too cold, let it sit. If it is too melted, add more ice and re-blend.

What to Serve With Watermelon Bourbon Slush

What to Serve With

This watermelon bourbon slush is a natural fit for cookouts, pool parties, and Fourth of July gatherings. Here is what I like to put next to it:

• Grilled anything. The sweetness of the slush cuts through smoky, charred flavors. Grilled chicken, burgers, ribs — all of it works.
• Our smoky BBQ ribs with bourbon glaze make a killer pairing. The bourbon in the drink echoes the bourbon in the glaze.
• Cheese boards. A sharp cheddar or aged gouda next to a cold slush is an underrated combination. Add some crackers and pickles and call it dinner.
• Our crispy smashed potato salad holds up well outdoors and complements the drink’s sweetness with its tangy, herby dressing.
• For a bourbon-themed evening, start with our classic bourbon old fashioned as a pre-dinner cocktail, then switch to the watermelon slush for the main event.

Nutrition Information

Nutrition Information

Per serving (1 of 4):

• Calories: approximately 185
• Total fat: 0g
• Carbohydrates: 18g
• Sugar: 14g (naturally occurring from watermelon)
• Protein: 1g
• Alcohol: approximately 1.4 standard drinks per serving

Values are estimates based on 2 oz bourbon per serving and no added sweetener. Adding honey or agave will increase calories by roughly 20-25 per tablespoon.

Frequently Asked Questions

<h3>Can I make this without a high-speed blender?

Yes. A standard blender works fine. You may need to blend for 90 seconds instead of 60, and stop once to push the frozen watermelon down from the sides with a spatula. Do not add extra liquid to help it blend — that thins out the slush.

<h3>What if I do not like basil?

Leave it out. The drink is still excellent with just watermelon, bourbon, and lime. Mint is a common substitute, but it changes the flavor profile significantly — you get more of a mojoto vibe. If you want herbal complexity without basil, try 4-5 tarragon leaves instead.

<h3>Can I use pre-cut watermelon from the store?

Absolutely. Pre-cut watermelon from the grocery store works well for this. Just make sure it is ripe — give it a sniff at the store. A sweet, slightly grassy smell means it is ready. If it smells like nothing, it will taste like nothing.

<h3>How far ahead can I make this for a party?

Freeze the watermelon up to 3 months ahead. Blend the full batch up to 4 hours ahead and keep it in the fridge, but plan to re-blend or stir vigorously before serving. For the best texture, blend fresh. If you need a fully make-ahead option, freeze the blended slush and let it thaw for 15-20 minutes before serving.

<h3>What bourbon do you recommend for this recipe?

Buffalo Trace ($25-30) is my top pick. It is sweet, smooth, and affordable. Maker’s Mark is a close second. Avoid high-rye bourbons like Bulleit or Four Roses Single Barrel — the spice competes with the watermelon. If you want to go budget, Evan Williams Black Label at $15 holds up fine in a blended drink like this.

<h3>Is this cocktail very strong?

Each serving has 2 oz of bourbon diluted with 1.25 cups of watermelon and ice. That puts it roughly in the strength of a strong wine spritzer. It goes down easy, so pace yourself. The frozen texture makes it taste lighter than it is.

Final Thoughts

This watermelon bourbon slush has been my go-to summer cocktail for three years running. It is the one people text me about after the party asking for the recipe. Make a batch this weekend and see for yourself. If you love it, save this post, share it with a friend who needs a new summer drink, and drop a comment below telling me what bourbon you used. I read every one.