Cut the avocados in half lengthwise. Remove the pit from the avocado and discard. Remove the avocado from the skin and place it into a food processor.
Add the sour cream, snipped chives and lime juice to the food processor and blend for 60 seconds until smooth. Add the water to thin out the crema and then remove it from the food processor using a spatula.
Taste and season with salt as needed.
Serve with tacos, nachos, or whatever else you see fit!