For the rim: 1 tsp coarse salt mixed with a pinch of chili powderoptional
Garnish: A slice of grapefruit and a lime wedge
Ice cubes
Instructions
Prepare the Rim (Optional): Rub the lime wedge around the rim of a tall glass (such as a highball glass). Pour the salt and chili powder mixture onto a small plate and dip the rim into the mixture.
Combine Juices: Fill the prepared glass with ice. Add the fresh grapefruit juice, lime juice, and agave or simple syrup.
Stir to Combine: Stir the ingredients gently until they are well combined.
Top and Serve: Top the mixture with chilled club soda or sparkling water. Garnish with a fresh slice of grapefruit and a lime wedge. Serve immediately.
Notes
For a slightly sweeter, less tart flavor, you can add a splash of orange juice to the mixture.