Gather all ingredients: fresh cilantro, limes, jalapeños, garlic, and mayonnaise. Rinse the cilantro and pat it dry.

Chop the stems and leaves of the cilantro coarsely and add them to the blender. Cut the jalapeños, remove seeds for milder flavor, and add them.

Squeeze the limes into the blender, then add the mayonnaise. This combo is crucial for the desired flavor.

Blend on high until smooth, about 30-60 seconds, scraping down the sides as necessary.

Check the sauce’s thickness; if too thick, add a splash of water or extra lime juice and blend briefly.

Transfer the sauce into a squeeze bottle or airtight jar, chill for at least 30 minutes to meld flavors.