Prepare the avocado: Halve the avocado, carefully remove the pit, and scoop the creamy flesh into a blender or food processor.
Mix the base ingredients: Add the Greek yogurt, mayonnaise, and buttermilk to the blender along with the avocado.
Add the flavors: Pour in the lemon juice, then sprinkle in the garlic powder, onion powder, dried dill, and dried parsley.
Blend until smooth: Blend all the ingredients together until you have a perfectly creamy and smooth dressing. Add more buttermilk for a thinner texture if desired.
Taste and adjust: Taste your dressing and adjust the seasoning with freshly cracked salt and pepper. Blend again briefly.
Chill before serving: Transfer the dressing into an airtight container and refrigerate for a minimum of 30 minutes.
Notes
Serve in a small bowl, drizzled over salad or with vegetable sticks. Garnish with freshly chopped parsley.