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    Home » Recipes » Make At Home Cocktails » Easy Grapefruit Rosemary Vodka Seltzer

    Easy Grapefruit Rosemary Vodka Seltzer

    Published: Sep 4, 2020 · Modified: Jan 23, 2023 by Chelsea Peachtree · This post may contain affiliate links ·

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    DIET: Gluten Free, Low Calorie, Low Lactose, Vegan, Vegetarian

    Cheers with this easy grapefruit rosemary vodka seltzer. Made with real rosemary simple syrup, fresh grapefruit juice and vodka, enjoy this refreshing grapefruit vodka drink anytime of the year.

    Two grapefruit rosemary vodka seltzer in highball glasses with rosemary garnish on a pink surface at a 90 degree angel.

    I absolutely love using fruit in my cocktails. Whether it is in my strawberry jalapeno margarita, my lemon raspberry mojitos or my cucumber moscow mule, these is nothing better than an at home cocktail with fresh fruit!

    Why You'll Love This Recipe

    • Easy to customize. This cocktail can be made with lower ABV by using regular seltzer in place of spike seltzer. If you like your cocktails on the boozier side, however, the spiked seltzer elevates this cocktail. If you love grapefruit cocktails, try my bourbon grapefruit drink!
    • Real rosemary simple syrup. Using simple syrup in this grapefruit vodka cocktail allows the rosemary flavor to really shine through. If you prefer your cocktail with less rosemary flavor, a simple garnish will be enough!
    • Impressive, yet simple. This cocktail will impress all of your friends due to unique taste and fancy garnishes. While it tastes like a bartender made it, it is only a few simple steps with ingredients likely already in your pantry.

    Ingredients and Substitutions

    • Grapefruit Juice. Using real grapefruit juice ensures this cocktail is fresh and there are no added sugars. If you do use store bought grapefruit juice, be cautious of added sugar; there is simple syrup in this cocktail, so it can quickly become too sweet.
    • Rosemary Simple Syrup. I recommend you make your own simple syrup. It is easy and can be done in 15 minutes and allows for the freshest flavor. You can also use store bought rosemary simple syrup. If you prefer not to use the simple syrup, you may garnish with rosemary to add a slight rosemary flavor + add your choice of liquid sweetener (optional).
    • Vodka. I used a plain vodka for this recipe. If you enjoy more flavor in your cocktails, you can use grapefruit vodka. I also have tried this cocktail with gin, and it worked well.
    • Spiked Seltzer- This recipe calls for grapefruit spiked seltzer. I like White Claw, but any brand will work. If you prefer to make this recipe with seltzer instead spiked seltzer, you may use a grapefruit flavored seltzer or plain.

    Step by Step Instructions

    Water boiling in a white sauce pan on a burner
    1. Begin by making the simple syrup. Add water to a small sauce pan and bring to a boil.
    Rosemary and sugar added into the same sauce pan on a burner
    1. Once the water begins to boil, add sugar and rosemary then reduce to a simmer, approximately 45-90 seconds.
    simple syrup in a white bowl with marble backdrop
    1. After the sugar has dissolved, remove from heat and allow to steep for 10 minutes then strain into a heat resistant jar or cup.
    grapefruit rosemary vodka seltzer in highball glass with ice halfway filled (no seltzer added)
    1. Add vodka, grapefruit juice, simple srup and lime juice into a high ball glass and mix. Add ice then fill to the brim with seltzer (spiked or regular).

    Storing and Reheating Instructions

    The simple syrup can be stored in an air tight container in the refrigerator for up to 5 days. If you notice it hardens at all, it could be due to the sugars not fully dissolving. Simply allow the simple syrup to "warm" up or you can microwave it gently for 15 seconds.

    Time Saving Hacks

    Save 15 minutes and make the rosemary simple syrup prior to making this cocktail. It will stay fresh for up to 5 days in the refrigerator.

    FAQs

    Which vodkas are grapefruit flavored?

    While this recipe calls for plain vodka, you can certainly use grapefruit flavored. Some of my favorites are: Western Son and Deep Eddys.

    How long will the rosemary simple syrup last for?

    If you refrigerate it, it will stay fresh for up to 5 days.

    What happens if I boil simple syrup for too long?

    It will become thicker when it cools. This is not an issue, and you can still mix it into the drink.

    Tips for Success

    • Use fresh grapefruit juice from the fruit itself. This will avoid any additional, unwanted sugar added to the drink.
    • Do not overboil your simple syrup. If you are wondering whether the sugar is dissolved, spoon out a small amount of the liquid while it is simmering. If you see sugar crystals, it has not dissolved fully yet.
    Two grapefruit rosemary vodka seltzer in highball glasses with rosemary garnish on a pink surface and juicer in the background

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    If you make this recipe, I would absolutely love for you to leave a rating and review.

    Easy Grapefruit Rosemary Vodka Seltzer

    Chelsea Peachtree
    Cheers with this easy grapefruit rosemary vodka seltzer. Made with real rosemary simple syrup, fresh grapefruit juice and vodka, enjoy this refreshing grapefruit vodka drink anytime of the year.
    No ratings yet
    Print Recipe Pin Recipe
    Prep Time 5 minutes mins
    Cook Time 15 minutes mins
    Course Drinks
    Cuisine American
    Diet Gluten Free, Low Calorie, Low Lactose, Vegan, Vegetarian
    Servings 1 cocktail
    Calories 200 kcal

    Ingredients
      

    Rosemary Simple Syrup *

    • ½ cup water
    • ½ cup granulated sugar or sugar alternative
    • 4 fresh rosemary sprigs

    Cocktail

    • .75 oz rosemary simple syrup* see notes
    • 3 oz fresh grapefruit juice
    • .75 oz lime juice
    • 1.5 oz vodka
    • 1 can grapefruit spiked seltzer or non alcohol grapefruit seltzer see notes

    Instructions
     

    Simple Syrup

    • Add water to a small sauce pan and heat until boiling.
    • Add sugar and rosemary then allow to simmer until the sugar is dissolved. This will take 45-90 seconds.
      To test whether the sugar is dissolved, spoon out a small portion of the liquid. If you still see sugar crystals, they have not dissolved yet and need to simmer longer.
    • Once the sugar has dissolved, remove from heat and allow to steep for 10 minutes.
    • Once it has steeped, strain into a heat resistant jar or container.

    Cocktail

    • Add lime juice, grapefruit juice, vodka, and simple syrup in a highball glass and mix.
    • Add ice (approx ½ cup) then fill to the brim with spiked seltzer (or regular seltzer) and mix again. Cheers!

    Notes

    • Rosemary Simple Syrup. I recommend you make your own simple syrup. It is easy and can be done in 15 minutes and allows for the freshest flavor. You can also use a store bought rosemary simple syrup.
    • If you prefer not to use the simple syrup, you may garnish with rosemary to add a slight rosemary flavor + add .75 oz of your choice of liquid sweetener (optional).
    • Spiked Seltzer- This recipe calls for grapefruit spiked seltzer. I like White Claw, but any brand will work.
    • If you prefer to make this recipe with non alcoholic seltzer instead spiked seltzer, you may use a grapefruit flavored seltzer or plain.

    Nutrition

    Calories: 200kcalCarbohydrates: 27gProtein: 1gFat: 1gSodium: 15mgPotassium: 176mgFiber: 1gSugar: 25gVitamin A: 17IUVitamin C: 29mgCalcium: 13mgIron: 1mg
    Follow Me on Instagram!@ChelseaPeachtree #chelseapeachtree

    If you are looking for more summery cocktails, click the images below.

    « Creamy Vegan Buffalo Sauce
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