Begin by salting the rim of your glass. I use a little honey or agave to cover half of the outer rim of a glass. Dip into course salt to prepare the rim, ensuring that none goes into the glass.
In a cocktail shaker, combine your tequila, grapefruit juice, lime juice and agave. Shake with ice for 10-15 seconds.
Pour into a glass filled with ice. Top the glass with sparkling water and stir.
Add a wedge of grapefruit as garnish.
Notes
Salting the rim is not necessary, but I love what it adds to this cocktail. I never skip it.
Fresh grapefruit juice is worth the effort and more delicious for sure. That said, I use store-bought juice often. No one will judge you.
If you don’t have tequila blanco available, you can substitute it for lightly aged reposado tequila. We don’t recommend anejo tequila (anything that has been aged for a long time).