Summer Protein Slushies Are the Coolest Way to Hit Your Protein Target

By: Rachel MacPherson

When mother nature cranks the heat, the last thing you'll likely want is a heavy shake or another lukewarm water bottle. A protein slushy is calling. Frozen, refreshing, and packed with the amino acids your muscles need for recovery and growth, they turn a regular protein shake into something you'll crave when temps climb.

Protein slushies took off on TikTok with the rise of countertop slushie machines like the Ninja Slushi, but you don't need any special equipment to make one. You can create a decent slushie with a blender, some ice, and some whey protein powder.

Here's how to create one, plus some easy recipe combos to try, including a recovery slush that swaps in electrolytes for training in the heat.

What Is a Protein Slushy?

A protein slushy (or slushie) is a frozen protein drink with a slushy, granita-like texture, somewhere between a smoothie and shaved ice. They've got that icy chill and coarse mouthfeel of a summery treat, plus 20 to 30 grams of protein per serving to support muscle recovery and satiety.

The main difference from a regular protein shake is the ratio of ice to liquid, which is much higher, and the texture, which is coarser and colder. If you've ever had a corner store slushy from the machine it's like that but built around a scoop of clean whey protein instead of syrupy sugar water.

How many calories in a slushie?

A typical convenience store slushie runs 150 to 300 calories from added sugars, but a homemade protein slushy is much better balanced. Most of the recipes above land between 200 and 250 calories with 25 to 30 grams of protein, plus vitamins and antioxidants from real fruit instead of syrup.

Can I use protein powder to make a slushy?

Whey protein works well in slushies because it blends smoothly and holds up to freezing without turning gummy. Use one scoop per serving (about 25 grams of protein), and blend it with plenty of ice and a small amount of liquid for a slushy style texture if you're using a blender. Vanilla, chocolate, and unflavored whey all work depending on the flavor profile you're after.

How to Make a Slushy at Home

Making a protein slushy at home is pretty easy, so long as you have a decent blender, or one of those fancy machines. The basic formula is one scoop of whey protein (about 25 grams protein), one to one and a half cup of ice, half a cup to one cup of frozen fruit, and a quarter to half a cup of cold liquid like water, unsweetened almond milk, coconut water, or a splash of sparkling water. Purist® Grass-Fed Whey Protein Isolate works particularly well since it blends smoothly and is NSF Sport Certified, gluten-free, and soy-free.

Add the liquid to your blender first, then the protein powder, frozen fruit, and ice on top. Blend on high for 30 to 45 seconds, stopping to scrape down the sides as needed. You want a thick, scoopable texture, not a pourable smoothie. If it's too runny, add more ice, and if it's too thick, add a splash more liquid.

Serve immediately in a tall glass with a spoon or thick straw. Protein slushies don't hold up well, so drink it right away.

Summer Protein Slush Recipes to Try

These four recipes each contain around 200 to 250 calories with 25 to 30 grams of protein per serving. Mix and match based on what's in your freezer.

Watermelon Wave Slush

Blend one scoop of vanilla whey protein, one cup of frozen watermelon chunks, a squeeze of lime, one cup of ice, and a quarter cup of coconut water. Finish with fresh mint if you have it. 

Berry Lemonade Protein Slush

Blend one scoop of vanilla whey protein, one cup of frozen mixed berries or some kiwi, the juice of half a lemon, one cup of ice, and a half cup of sparkling water. The sparkling water makes it feel a bit bubbly like a slushy machine drink.

Chocolate Frappé Protein Slush

Blend one scoop of chocolate whey protein, half a cup of cold coffee, half a cup of unsweetened almond milk, a teaspoon of cocoa powder, and one and a half cups of ice. It's basically a coffee shop frozen mocha, minus the sugar bomb.

Post-Workout Recovery Slush

If you've just wrapped a hot summer session, this one hits protein and electrolytes in one glass. Blend one scoop of vanilla whey protein with one scoop of Purist® Hydration in Strawberry Lemonade or Peach Mango, half a cup of frozen strawberries or mango, half a cup of water, and one and a half cups of ice. You'll get 25 grams of protein plus 510 mg sodium and 250 mg potassium to replace what you've sweated out. 

See more on what electrolytes do and why they matter if you're new to the concept.

Using a Slushie Machine

If you've picked up a Ninja Slushi or similar countertop machine, protein slushies are even easier to make. Pour your protein shake mix into the machine and let it run per the manufacturer's instructions. Note that most zero-sugar liquids won't freeze properly on their own, so you may need to add a scoop of allulose or a similar sugar substitute per serving to hit the right texture.

For a Ninja Creami, blend your protein slush base, freeze it overnight in the pint container, then run it on the Slushi setting for more of a sorbet-style scoop (you can always let it melt a little to get a consistency closer to a slush). The stacked water trend is another creative way to add protein and hydration into your summer routine if machines aren't your thing.

Takeaway

A protein slushy is one of the easiest ways to keep your protein intake on point when it's too hot for a regular shake. Blend whey with ice, frozen fruit, and a cold liquid, and you've got a refreshing, macro-friendly drink in under five minutes. Add a scoop of hydration powder on training days to get your protein and electrolytes in at the same time. 

See how other high-protein shake recipes can round out your summer lineup.