Add all ingredients with ¼ cup of the buttermilk to a blender. Puree for about 10 seconds to combine. Check the consistency and add additional buttermilk a couple tablespoons at a time if you desire a thinner dressing.
Store in a glass jar or airtight container in the refrigerator for 7 to 10 days.
Notes
Mayonnaise and Sour Cream: Full-fat versions of both of these give the best flavor and texture. Low-fat versions will water down the dressing, both in taste and texture.
Lemon juice: You can substitute for lime juice or white vinegar if you don’t have any lemon juice.
Herbs: You can mix and match the herbs you use. You can also try dill, cilantro, and parsley. Onion powder is also a great addition!
Variations: Read the article above for some ideas on how to jazz up this dressing to add different flavors!
Storage: The dressing can be stored in a glass jar or airtight container in the refrigerator for up to 10 days. It can thicken up in the fridge, so if you want to thin it out again, add a small drop of buttermilk or regular milk and give it a stir.
Nutritional values are based on 1 cup of dressing.