Suro-Mago

Rinse a Double Old Fashioned Glass with mezcal, then discard the rinse.

Combine the reposado tequila, manzanilla sherry, elderflower liqueur, and a dash of orange bitters in a mixing glass.

Stir the mixture with ice until well-chilled.

Strain the cocktail into the prepared coupe.

Garnish with a twist of grapefruit, expressing its oils over the drink before placing it in the glass.