Classic Ranch with Broccoli Dippers

Prepare an ice-water bath. Bring a large pot of salted water to a boil. Add broccoli; return to a boil and cook until crisp-tender, about 30 seconds. Drain broccoli and transfer to ice-water bath; drain again, then pat dry.

Whisk together sour cream, mayonnaise, buttermilk, parsley, dill, chives, garlic powder, and lemon zest and juice. Season with salt and pepper and serve with broccoli, sprinkled with more zest and chives.