Prep the cucumbers: Cut each cucumber into 1-inch rounds. Use a small spoon or melon baller to scoop out a shallow well in the center of each piece, leaving the bottom intact.
Don’t scoop all the way through.
Drain any excess moisture: Lightly sprinkle the cucumber cups with salt and place them upside down on a paper towel while you make the chicken salad. This helps keep them crisp.
Make the dressing base: In a mixing bowl, combine mayonnaise, sour cream, lemon juice, and ranch seasoning. Stir until smooth.
Taste and adjust seasoning if needed.
Fold in the mix-ins: Add shredded chicken, celery, red onion, dill, and chives. Stir gently to coat everything evenly. Season with salt and pepper to taste.
Customize: If using bacon, avocado, or spices like garlic powder or smoked paprika, fold them in now.
Keep the avocado pieces small so they sit neatly in the cups.
Fill the cups: Pat the cucumber rounds dry. Spoon the chicken salad into each cup, packing it slightly so it holds. You want a small mound on top without spilling over.
Garnish: Finish with a sprinkle of dill, chives, or a crack of black pepper.
A light dusting of paprika looks great for presentation.
Serve or chill: Serve immediately for maximum crunch, or chill for 15–20 minutes to let the flavors meld.