Mix the base: In a medium bowl, whisk together sour cream and mayonnaise until fully combined.
Add buttermilk: Slowly whisk in the buttermilk to loosen the mixture slightly.
Season and flavor: Stir in fresh dill, lemon juice, garlic powder, onion powder, and a pinch of salt and pepper.
Taste and adjust: Add more lemon juice or dill to taste, adjusting salt as needed.
Chill before serving: Refrigerate the dip for at least 30 minutes to let the flavors meld before serving.
Notes
Storage: Keep refrigerated in an airtight container for up to 5 days.Substitutions: Swap fresh dill for dried (use less), or add chives/parsley for variation.Texture tip: For a thinner consistency, add more buttermilk one teaspoon at a time.