Start by washing the jalapeños and cilantro leaves to remove any dirt.
Remove the stems from the jalapeños. If you prefer less heat, you can also remove the seeds.
In a blender or food processor, add the following: buttermilk, sour cream, mayonnaise, salsa verde, cilantro leaves, jalapeños, onion powder, garlic powder, salt, and ground black pepper
Blend all the ingredients together until the mixture is smooth and well combined. If the sauce is too thick, you can add a little more buttermilk to thin it out.
Taste the sauce. If needed, you can add more salt, black pepper, or spices to suit your preference.
Transfer the green sauce to an airtight container and place it in the refrigerator for at least 30 minutes. This helps the flavors mix well.
After chilling, your Jalapeno Tree Green Sauce is ready to serve! Use it as a dip or a condiment for your favorite dishes.