1jalapeñosliced into rounds, seeds and pulp included
For the fizzy margaritas:
granulated sugar + kosher saltfor rimming the glasses
2tablespoonsfresh lime juice
1ounceorange liqueursuch as Grand Marnier or Cointreau
additional lime slicesjalapeño slices, and peach slices to garnish (optional)
Place the peaches in a medium bowl and mash with a fork. Set aside.
In a small saucepan, combine the water, sugar, and jalapeño slices. Bring to a gentle boil and stir until the sugar dissolves. Pour the hot syrup and jalapeño slices immediately over the peaches. Let cool to room temperature, then strain to remove the solids. Transfer to an airtight container and chill in the refrigerator until ready to use.
Salt the glass rims (optional): If desired, run a lime slice around the top rim of two glasses to moisten. Place a small amount of equal parts sugar and salt on a shallow plate. Turn the glass over, then gently press the wet glass rim around in the sugar and salt until it sticks. Repeat with the second glass. Fill glasses with ice.
In a cocktail shaker filled with ice, place 2 ounces peach jalapeño simple syrup, lime juice, tequila, and orange liqueur. Secure the lid and shake for 30 seconds. Strain into the prepared glasses.
Top each glass with a splash of club soda Garnish with lime wedges, jalapeño slices, and peach slices as desired. Enjoy immediately.