If you prefer a salted rim, rub the lime wedge around the rim of a rocks or coupe glass, then dip the rim into a shallow plate with coarse salt. Fill the glass with ice if serving on the rocks, or leave chilled if serving up.

Shake

Add reposado tequila, fresh lime juice, fresh grapefruit juice, agave syrup, orange liqueur, and bitters into a cocktail shaker. Fill the shaker with ice (about 1 cup). Secure the lid and shake vigorously for 12–15 seconds until well-chilled and slightly diluted.

Strain and serve

Double-strain the contents into the prepared glass: over fresh ice if serving on the rocks, or into the chilled coupe/rocks glass without ice if serving up. Double-straining removes small ice shards and pulp for a cleaner texture.

Garnish

Express the oils from a grapefruit twist over the cocktail by holding the twist skin-side down above the drink and giving it a quick pinch; then drop the twist into the glass or rest a grapefruit wheel on the rim. Serve immediately.