Rub a lime wedge around the rim of your glass, then dip the edge into salt or Tajín for a flavorful finish. Set aside.
Blend 2 cups of watermelon cubes until smooth. Strain the juice through a fine mesh sieve to remove pulp and seeds.
Chill the juice in the fridge while prepping the rest.
In a cocktail shaker, add 1-2 slices of jalapeño. Gently muddle to release the oils for a subtle heat. Adjust the amount based on your spice tolerance.
To the shaker, add: 1½ ounces of tequila, 1 ounce of fresh lime juice, ½ ounce of orange liqueur, ½ ounce of simple syrup or honey, 1 cup of fresh watermelon juice.
Add ice to the shaker, seal it tightly, and shake vigorously for 15-20 seconds until well combined and chilled.
Fill your prepared glass with ice.
Strain the margarita mixture into the glass using a cocktail strainer. Use a fine mesh strainer for a smoother finish if desired.
Garnish with a slice of watermelon, a lime wheel, or a jalapeño slice.
Sip, savor, and enjoy the perfect blend of sweet and spicy!