Step 1

Rim a glass with a grapefruit wedge.

Step 2

Dip the glass into sal de gusano to coat the rim. Set aside.

Step 3

In a cocktail shaker, combine the Mezcal, grapefruit juice, lime juice, Cointreau, crushed dried Mexican peppers, and half of the jalapeño slices.

Step 4

Fill the shaker halfway with ice.

Step 5

Shake well for about 15–20 seconds.

Step 6

Strain into the prepared glass over fresh ice.

Step 7

Garnish with a grapefruit wedge and the remaining jalapeño slices. Serve immediately.