Step 1

Preheat oven to 400°F. Coat an 8-inch square (2-quart) baking dish with cooking spray; set aside. Melt butter in a large nonstick skillet over medium heat. Add onions; cook, stirring occasionally, until translucent and starting to brown, about 20 minutes. Reduce heat to medium-low; cook, stirring often, until the onions are very tender and brown throughout, 15 to 20 minutes. Remove from heat.

Step 2

Combine cream cheese, yogurt, salt, pepper, onion powder, garlic powder and cayenne in a large bowl. Beat with an electric mixer on medium speed until smooth, about 1 minute. Fold in chicken, rice and the cooked onions. Spoon the mixture into the prepared baking dish. Sprinkle with crushed potato chips and cover with foil.

Step 3

Bake until bubbly, about 30 minutes. Remove the foil and continue baking until the topping is crispy and lightly browned, about 10 minutes. Garnish with chives, if desired.