Longhorn Steakhouse Watermelon Margarita Authentic Recipe

Updated on January 18, 2017

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3.9 stars from 61 ratings of Longhorn's Watermelon Margarita

One Great Drink!

There's lots of websites that claim to have this recipe or that recipe. I made one of those so-called recipes for dinner last night. Needless to say, my family was a bit disappointed because it wasn't exactly what they remembered from the restaurant.

This margarita recipe is exactly what the bartenders do at the restaurant. Most bartenders don't use jiggers so their pour may be heavier or lighter than what you remember. I highly recommend you use a jigger or some other means to get your pours accurate. After you taste it, you can tweak it to your taste.

Watermelon Margaritas are a summertime favorite!
Watermelon Margaritas are a summertime favorite!
Monin Watermelon syrup makes this drink taste like real watermelon!
Monin Watermelon syrup makes this drink taste like real watermelon!


  • 1 1/4 ounce Don Julio Blanco Tequila
  • 3/4 ounce Smirnoff Watermelon
  • 2 ounce Monin Watermelon syrup
  • 6 ounce sour mix
  • splash Grenadine
  • watermelon sugar, for the rim
  • sliced watermelon, garnish


  1. Add liquors and all other ingredients to a martini-like shaker. Fill with ice. Put on shaker's lid. Shake.
  2. Wet lip of margarita glass with water and then dip into superfine sugar that is colored and flavored with a drop of Monin syrup. You'll have play with the amount... mix the sugar with a drop of syrup and then stir.
  3. Strain and pour into a glass or over ice. Enjoy!

Where to Buy the Ingredients

Most local liquor stores will carry the Don Julio Blanco tequila and the Smirnoff Watermelon. Grenadine is cherry-flavored syrup that is typically used to make drinks like Shirley Temples. I have found this item at Super Target.

The sour mix is readily available at any grocery or liquor store. If you want to cut calories, this is where you can do it by substituting a sugar-free version.

Monin Watermelon is a bit more difficult to find. Try your local liquor store first, especially if you are looking in summertime. Amazon, of course, sells it online. The link is below. The flavor is spot-on! Monin's products are worth using!


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    • my_girl_sara profile image

      Cynthia Lyerly 2 years ago from Georgia

      I'm not an employee there anymore so I can't. Sorry.

    • profile image

      TNFNP 2 years ago

      Any chance you can get the recipe for the Longhorn Black & Blue margarita? I LOVE that drink!

    • my_girl_sara profile image

      Cynthia Lyerly 2 years ago from Georgia

      I used to work there and got the recipe directly from the bartender. Glad it worked out for you as well. Thanks for the comment!!

    • profile image

      Becca_love 2 years ago

      Bought all of the ingredients listed and just made my first watermelon margarita per the above instructions and it is Amazing!!! Just like at Longhorn

    • my_girl_sara profile image

      Cynthia Lyerly 3 years ago from Georgia

      Can't wait to hear how it tastes. I used to work at Longhorn and this is the recipe the bartenders would use. Thanks for the comment.

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      Judy Jascomb 3 years ago

      I had my first Watermelon Rita at Longhorn two weeks ago, and I am mad for it!

      Found your recipe online, and as soon as the Monin syrup arrives from Amazon, I will be mixing it at home. Am dying to try it, and will give feedback soon!

    • my_girl_sara profile image

      Cynthia Lyerly 4 years ago from Georgia

      Let me know how it turns out. Thanks for the vote and the comment!

    • Eiddwen profile image

      Eiddwen 4 years ago from Wales

      Mmm sounds and looks great ;so one for me to vote up and share.

      I shall let you know how I got on with it.

      I now look forward to many more by you.