01 - In a medium bowl, combine mayonnaise and sour cream. Whisk until completely smooth and thoroughly blended.
02 - Stir in minced jalapeños, jalapeño brine, minced garlic, cumin, onion powder, salt, and black pepper. Mix until evenly distributed throughout the base.
03 - Add fresh lime juice and chopped cilantro. Mix well to combine all ingredients thoroughly.
04 - Cover the bowl and refrigerate for at least 1 hour to allow flavors to meld together. This resting period is essential for optimal taste development.
05 - Remove from refrigerator and stir well before serving. Serve chilled as a dip for tortilla chips or as a sauce drizzled over tacos and grilled meats.