Light, fizzy, and topped with a cloud-like froth, the Whitecap cocktail is one of those drinks that instantly transports you to a breezy afternoon by the sea. It’s citrusy, a little sweet, and finishes with a refreshing sparkle-perfect for warm days or whenever you want a sip of something bright and elegant. I’ve made this drink countless times for summer get-togethers, and it never fails to impress. Let me walk you through how to make it just right.

Whitecap
What You’ll Need
Prep Time: 5 minutes
Servings: Makes 1 cocktail
Glassware: Highball or Collins glass (chilled if possible)
Ingredients
– 2 oz (60 ml) white rum
– 1 oz (30 ml) fresh lime juice (about 1 lime)
– 0.5 oz (15 ml) simple syrup (1:1 sugar to water)
– 1 oz (30 ml) egg white or aquafaba (chickpea liquid, for a vegan option)
– Club soda, to top
– Optional garnish: fresh mint sprig or lemon twist
Method
- In a cocktail shaker, add the white rum, fresh lime juice, and simple syrup.
- Fill the shaker with ice and shake for about 15 seconds. This chills and dilutes the mix just enough.
- Strain out the ice, then add the egg white or aquafaba to the shaker. Shake again-this time without ice-for about 20 seconds. This second shake is called a *dry shake* and helps build that signature frothy top.
- Pour into a chilled Highball or Collins glass.
- Top gently with club soda. Pour slowly so you don’t lose the foam. You should see a soft, foamy head form-that’s your “whitecap.”
- Add a sprig of mint or a lemon twist for a fresh aroma.
Tips & Tricks
– Use fresh lime juice-bottled just doesn’t have the same brightness.
– Chill your glass ahead of time for a colder, crisper drink.
– Add the club soda last to keep the bubbles lively and the foam intact.
– If you’re using aquafaba, make sure it’s unsalted for the best taste.
Make-Ahead Notes
You can mix the rum, lime juice, and simple syrup a few hours in advance and keep it in the fridge. Just add the egg white and soda when you’re ready to serve. Shake fresh for the froth!
Substitutions
– White rum: Try dark or spiced rum for a deeper flavor.
– Simple syrup: Swap in honey syrup or elderflower syrup for a twist.
– Club soda: Flavored sparkling water (like lime or berry) works well too.
– Egg white: Use aquafaba if you’re vegan or avoiding raw egg.
What It Tastes Like
A Whitecap is smooth and light, with a gentle citrus tang and a soft sweetness from the syrup. The rum gives it a clean backbone, while the froth adds a creamy texture. It’s like sipping on an ocean breeze-refreshing, balanced, and oh-so-sippable.
This has been my go-to cocktail for summer nights on the patio. It’s light enough that you can enjoy more than one, but flavorful enough to feel special.
Serving Suggestions
The Whitecap shines on its own, but if you’re looking to pair it with food, here are a few ideas:
Grilled Fish Tacos
The lime and rum in the cocktail highlight the smoky, spicy notes in grilled seafood.
Summer Salads
Especially ones with citrus dressings or grilled fruit-this drink mirrors those bright flavors beautifully.
Fruit Sorbet
A scoop of mango or raspberry sorbet on the side makes for a light, elegant dessert.
Storage
Whitecaps are best made fresh, especially because of the frothy top. However, you can keep the rum-lime-syrup mix sealed in the fridge for up to 2 days. Just give it a good shake with egg white and soda when you’re ready.
Variations to Try
Tropical Whitecap
– Add a splash of pineapple juice and a spoon of coconut cream.
– Blend with crushed ice for a frozen version that tastes like a beach vacation.
Spiced Whitecap
– Add a pinch of cinnamon and nutmeg before shaking.
– These warm spices pair surprisingly well with the citrus.
Berry Whitecap
– Muddle a few fresh raspberries or blackberries in the shaker before adding the other ingredients.
– Garnish with a berry skewer for a pop of color and flavor.
Virgin Whitecap (Non-Alcoholic)
– Replace the rum with ginger ale or lemon-lime soda.
– Follow the rest of the recipe for a fizzy, citrusy mocktail.
Common Questions
Can I make it without alcohol?
Yes! Swap the rum for ginger ale or flavored soda-it’s still light and refreshing.
How do I get that foamy top?
Shake twice! First with ice, then without. That second shake (called a dry shake) is what builds the foam.
Is it too sweet?
Not at all. The lime juice balances the syrup, so it’s sweet with a tart edge. You can always reduce the syrup to your taste.
Can I batch this for a party?
You can pre-mix the rum, lime, and syrup in a pitcher and keep it chilled. When serving, shake each portion with egg white and top with soda for the best froth.
Do I have to use egg white?
Not if you don’t want to. Aquafaba is a great alternative, or you can skip it entirely-you just won’t get the foamy top.
What are common mistakes?
– Using bottled lime juice-fresh really makes a difference.
– Adding soda too quickly-it can flatten the froth.
– Skipping the dry shake-you’ll miss out on that signature creamy texture.
The Whitecap’s one of those cocktails that looks fancy but is actually super simple to make once you know the steps. Try it out, tweak it to your liking, and maybe even invent your own twist on it. Cheers!