Combine Greek yogurt, lemon juice, and apple cider vinegar in a small bowl. Whisk until smooth and creamy, with no lumps.
Finely chop the fresh dill, chives, and parsley, then add them to the bowl. Stir to distribute the herbs evenly through the yogurt mixture.
Mince the garlic very finely and add it to the mixture. Stir well so the garlic disperses evenly, releasing a fragrant aroma.
Season with salt and black pepper, then whisk again to combine all the flavors thoroughly.
If the dressing feels too thick, add 1 to 2 tablespoons of buttermilk or milk. Whisk until it reaches a pourable, velvety consistency.
Transfer the ranch to a jar or container, cover, and refrigerate for at least 30 minutes to allow flavors to meld and herbs to soften.
Before serving, give the ranch a gentle stir, check the consistency, and adjust with a splash more milk if needed. It should be smooth, vibrant green, and fragrant with herbs and citrus.
Enjoy this fresh, tangy Greek Yogurt Ranch as a dip, drizzle, or marinade—perfect for adding a bright herbal punch to your dishes.