To prepare the marinade, combine the lime juice, tequila, sugar, chopped garlic, chopped cilantro, ground cumin, salt, pepper and olive oil in a zip top bag or large bowl. Check the notes if using pre-made margarita.
Season the chicken with salt and pepper to taste. Add the chicken to the marinade.
Marinate for 15 minutes or overnight in the refrigerator.
Heat up a grill to medium high. Remove the chicken from the marinade and grill turning once for about 5-6 minutes per side or until cooked through.
Remove from the grill to a plate, cover with foil and let it rest for about 5 to 10 minutes. Serve
If using bottled Margarita with tequila, omit the first 3 ingredients.
Cook the chicken until it reaches an internal temperature of 160 to 165 degrees Fahrenheit. Allow the chicken to rest for 5 to 10 minutes before consuming. This resting period will increase the temperature by 5 to 10 degrees due to carryover cooking.
The safe internal temperature for chicken is 165 degrees Fahrenheit.
Nutrition information provided is an estimate and will vary based on the brands of ingredients used