In a cocktail shaker, combine the tequila, lime juice, Ancho Reyes, simple syrup, and Angostura bitters.
Fill with ice and shake vigorously until the shaker feels very cold — at least 1 minute.
Strain the cocktail into 2 coupe or martini glasses.
Drop a maraschino cherry into each glass and let it sink to the bottom.
Raise your glass, say cheers, and savor the smoky, spicy goodness!