Grapefruit Mint Margarita

I had about 1/4 of a grapefruit, my mint plant is huge, and the new elderflower liqueur I bought (St. Germain) smells like grapefruit, so I made a grapefruit mint margarita. It was really good, definitely worth repeating. If you don’t have elderflower liqueur you can use Cointreau (or another good orange liqueur) instead. If you don’t have mint just leave it out and you’ll still have a perfectly good margarita. I’m thinking of making grapefruit syrup next time, to use instead of the simple syrup.

8 mint leaves
2 oz tequila

1/2 oz elderflower liqueur (or Cointreau)

3/4 oz lime juice (about 1 lime)
1 1/2 oz grapefruit juice
1 oz simple syrup

garnish: mint sprig 

Muddle the mint with the lime juice, then add the other ingredients and shake with ice until cold. Strain into a cocktail glass with fresh ice. Garnish with a mint sprig. 

UPDATE… For a frozen version, increase the grapefruit juice to 2 ounces and the elderflower liqueur to 3/4 ounce, be sure to strain out the mint leaves (after muddling with the lime juice), then blend with 1 cup ice. I also used 1 ounce homemade grapefruit syrup instead of the simple syrup. It was very good and a very pretty color.