Mix 1/2 to 1 sliced seeded jalapeno and 1 1/4 cups tequila in a glass; let stand 1 hour. Rub the rim of 4 short glasses with lime and dip in a mixture of 2 tablespoons each sugar and coarse salt. Fill three-quarters of the way with ice. Combine the jalapeno tequila, 1/2 cup fresh lime juice, 3 tablespoons orange-flavored liqueur and 2 teaspoons superfine sugar in a cocktail shaker. Shake well, then pour into the glasses. Garnish with cilantro.
Photograph my Andrew Mccaul