Preheat oven 375°F(190°C). Mix ground beef, breadcrumbs, BBQ sauce, smoked paprika, garlic powder, and ¼ teaspoon each of salt and pepper in a bowl.
Fill a muffin tin with paper muffin cups. Shape the meat into 12 cupcakes with a rounded top, placing the meat in the muffin cups. Bake 25-30 minutes, until the meat reaches 165°F(75°C).
Boil cubed potatoes, starting from cold water, for 20 minutes, or until soft. Drain and mash.
Mix mashed potatoes, remaining 1/2 teaspoon of salt and pepper, butter, milk, and cheddar cheese until smooth.
Cool meat slightly; frost with mashed potatoes, drizzle with more bbq sauce, garnish with bacon and green onions.