Zest and juice the lemons and limes. Reserve.
Mince the well-rinsed and dried cilantro. Reserve.
Smash the garlic cloves with the flat side of a knife. Mince the garlic thoroughly. Reserve.
Measure out the apple cider vinegar, sugar, cumin, and black pepper. Reserve
In a large mixing bowl, measure out the buttermilk, sour cream, and mayonnaise. Then, use a wire whisk and combine the ingredients thoroughly.
Once the dressing base is made, add the zest, cilantro, garlic, apple cider vinegar, sugar, cumin, and black pepper, whisking together occasionally. Check for salt. You may find you don't need any.