The formula for a margarita is 2-1-1. This formula refers to the ratio of ingredients in a classic margarita. 2 parts tequila 1 part lime juice 1 part triple sec This is the basic base formula ratio for margaritas, but can always be adjusted for your tastes and preferences. From this base, you can add garnishes, sweetness, and additional flavors like strawberry, pineapple, jalapeños, and mango.