My mother-in-law blends up this 3 ingredient masterpiece every time the weather gets warm. I never believed it was so simple until I watched my kids drain their cups.

This 3-ingredient watermelon slushie is exactly the kind of warm-weather ritual that sneaks up on you and becomes non-negotiable. My mother-in-law has been blending this for years in her small Midwestern kitchen, and every time the temperature climbs, out comes the blender and the mason jars. I didn’t fully appreciate how simple it was until I watched my kids drain their cups in minutes—no artificial colors, no mystery syrup, just frozen watermelon, a squeeze of lime, and a spoonful of honey. It’s a practical, budget-friendly way to use up extra watermelon and turn it into something that feels like a treat from a smoothie shop, but with ingredients you can actually pronounce.

Serve the slushie immediately in chilled mason jars or sturdy glasses so the icy texture holds. It pairs well with light summer meals like grilled chicken, veggie kebabs, or a big chopped salad. For snacks, pour it alongside popcorn, chips and salsa, or a plate of sliced cucumbers and carrots for balance. If you’re hosting, line the jars up on the counter and garnish with a small wedge of lime or a tiny triangle of watermelon. It also works beautifully as a non-alcoholic option at cookouts—set it next to the lemonade and iced tea, and let everyone help themselves while the blender stays parked on the laminate countertop, ready for refills.

Servings: 2

4 cups seedless watermelon cubes, frozen solid

Prep the watermelon ahead: Cut seedless watermelon into 1-inch cubes, removing any seeds. Spread the cubes in a single layer on a baking sheet or large plate lined with parchment, and freeze until completely solid, at least 3 to 4 hours or overnight. Once frozen, transfer the cubes to a freezer bag so they’re ready whenever the weather turns warm.

Set up your blender: When you’re ready to make the slushies, add 4 cups of frozen watermelon cubes to a blender. Pour in the freshly squeezed lime juice and 2 tablespoons of honey to start.

Begin blending: Start the blender on low speed, pulsing a few times to break up the frozen watermelon. If the mixture won’t move, drizzle in 1/4 cup of cold water around the sides and continue blending, gradually increasing to medium speed.

Adjust texture and sweetness: Stop and scrape down the sides of the blender as needed. If the slush is too thick or the blender strains, add more cold water a tablespoon or two at a time until you reach a thick, spoonable, icy texture with a smooth frosty surface. Taste and blend in up to 1 additional tablespoon of honey if you prefer it sweeter.