1 slice lime
Black lava salt (to rim glass; find it at Earth Fare)
11/2 oz. tequila (Lunazul Blanco preferred)
1 oz. fresh blood orange juice (find it at WholeFoods Market)
1/2 oz. fresh lime juice
3/4 oz. dry curaçao (Pierre Ferrand preferred)
1 slice serrano pepper
Run the lime slice around the rim of the serving glass to wet it. Dip glass rim in salt to coat. Combine remaining ingredients and shake with ice. Pour into salted glass.
Note: For more servings, Batch’s Katie Poole says to multiply measurements by the total guest count.