Add garlic cloves to bowl and sprinkle with salt. Use back of fork to mash garlic until garlic paste is formed, then add remaining ingredients.
Whisk well to thoroughly combine all dressing ingredients. Taste and adjust seasonings (salt, pepper, white vinegar, paprika, garlic) as needed. Note: if dressing is too thick, whisk in additional buttermilk in 1 tablespoon increments until desired consistency is achieved.
Cover bowl, or transfer dressing to jar with airtight lid. Refrigerate dressing for 1 hour minimum, then serve.
Recipe Notes
Mayonnaise: Use real mayonnaise for the best flavor. Hellman's is my favorite here, but if you prefer a different brand you can use it instead.
Garlic: Adjust to your taste! If you're not a fan, stick to just 1 clove. For really spicy garlickiness, go for 3. That's what we do.
Make it Vegan: Use a vegan mayonnaise and a plant-based buttermilk. Alternately, make your own "buttermilk" by mixing 1 cup unsweetened non-dairy milk with 1 tablespoon lemon juice or white vinegar.
Leftovers: Refrigerate dressing in an airtight container up to 2 weeks.