Tequila and Grapefruit Cocktail – “The Professor”

This Tequila and Grapefruit cocktail or “The Professor”, as we call it, is a simple citrus cocktail that is the perfect way to celebrate summer! This citrusy cocktail infuses the flavors of oranges, limes and grapefruit in a bright and refreshing drink. This is one of our favorite pool side drinks along with the Italian Margarita and my husbands John’s famous Long Island Iced Tea.

A pitcher of a citrus cocktail with slices of oranges and limes on a blue tablecloth.

There are other citrus flavored cocktails that we know and love, but sometimes we just want something new. So here you go…a nice alternative to the Margarita and Paloma. The Professor takes what you love about those tasty drinks and adds a little orange to the lime and grapefruit. The result is a refreshing cocktail that reminds me of summer!

For an equally delicious cocktail that is perfect for colder fall days, try the Apple Cider Margarita.

The origins

My sister-in-law, Mary Beth, made this simple citrus cocktail to celebrate my niece’s graduation and I absolutely fell in love with it! Mary Beth teaches at the University of Cincinnati, so we felt that the name of the cocktail should represent it’s creator. She has many talents and coming up with great cocktails is only one of them.

A globe shaped glass of a grapefruit cocktail with slices of oranges and limes.

How to make this Tequila and Grapefruit Cocktail

This summery cocktail is as easy as it gets. Just mix tequila, Grand Marnier, lime juice and Fresca, Squirt, or another grapefruit flavored soda in a pitcher, add ice and enjoy. This cocktail is sweet enough without added sugar, so I would recommend using a non-caloric soda. Garnish the glass and pitcher with slices of orange and lime for a truly festive drink.

A stemmed globe shaped glass filled with a tequila and grapefruit cocktail garnished with orange and lime slices surrounded by a pitcher of the cocktail and halved oranges and limes.

Looking for some summery recipes ideas to serve with this cocktail?

Try one of these dishes:

Salmon Burgers with Mango Slaw and Lime Aioli

Easy Honey Grilled Shrimp

Easy Italian Cucumber and Tomato Salad

Other cocktails for your next gathering?

Sicilian Kiss – Cocktail or Shot

The Professor is citrus summer cocktail of orange, lime and grapefruit flavors. Served in a globe glass with sliced oranges and limes it makes the perfect summer cocktail.

Tequila and Grapefruit Cocktail -“The Professor”

The Professor is a citrusy cocktail featuring the flavors of oranges, limes and grapefruit. This delicious cocktail is perfect for sipping by the pool, on the beach or just sharing with friends.
5 from 3 votes
Prep Time 10 minutes
Total Time 10 minutes
Course Drinks
Cuisine American
Servings 6
Calories 107 kcal


  • 24 oz Grapefruit soda such as Fresca, Squirt or other sugar free grapefruit soda
  • 4 oz Tequila
  • 4 oz Grand Marnier
  • 4 oz Lime juice fresh squeezed
  • Ice
  • Oranges and Limes for garnish, optional


  • Mix all of the ingredients in a Pitcher. Add ice, stir and serve over ice. Garnish with limes and oranges (optional).


I recommend using Fresca, Squirt or another non-calorie grapefruit flavored soda.  The added sugar from a regular soda may make this too sweet and it will alter the nutritional values of this drink.


Serving: 6gCalories: 107kcalCarbohydrates: 8gProtein: 1gFat: 1gSaturated Fat: 1gSodium: 2mgPotassium: 28mgFiber: 1gSugar: 6gVitamin A: 9IUVitamin C: 6mgCalcium: 3mgIron: 1mg
Keyword citrus, grapefruit, tequila, grand marnier, orange, lime, grapefruit soda, citrus soda, Squirt
Tried this recipe?Let us know how it was!

Similar Posts


  1. I can’t wait to make it…this could be the signature cocktail for “2021”👏👏👏😊

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating

This site uses Akismet to reduce spam. Learn how your comment data is processed.