12 ounces tequila blue (preferably 100 percent agave tequila blanco)
Equipment
mortar and pestle
Directions
Make the cocktails: In a glass pitcher, muddle the raspberries and jalapeno, then fill halfway with ice.
Add the tequila, grapefruit juice, lime juice and agave. Take a second pitcher (the same size) and pour one into the other repeatedly to mix the drink together. Top it off with club soda or lemon-lime soda.
Make the grapefruit salt: Crush the salt and grapefruit zest together with a mortar and pestle, then spread on a plate. Run a lime wedge around the rim of each glass, then dip the glasses in the grapefruit salt. Fill with the cocktails.