In a medium-sized bowl, combine ground beef, all-purpose seasoning, pepper, and Worcestershire sauce. Once combined, create 8 individual mini hamburger patties about ¼ inch thick.
In a large skillet over medium-high heat, melt 1 tablespoon of butter, brown the patties. About 3–4 minutes per side. Remove from the skillet and set aside.
Drain off all but 2 tablespoons of grease and return to the stove. Add one tablespoon of butter. Add the onions and garlic, stir to cook, about 3 minutes until golden and caramelized. Add the cooked and crumbled bacon. Stir to combine.
Slowly and carefully add the whiskey. IF cooking over an open flame, turn the flam off momentarily until whiskey has been added. Allow the whiskey to reduce in half, 2–3 minutes. Add BBQ sauce. Stir to combine.
Reduce the heat to low and place the patties in the sauce. Turning to coat. Let the patties simmer in the sauce until everything is hot and bubbly.
While the patties are simmering, cut the slider buns in half. Butter the inside of each bun. Place the buns, buttered side down, on a hot griddle or skillet and toast until golden brown.
Place the buns on a serving platter. Place a patty on the bottom of each toasted bun. Spoon extra sauce over the top of each patty. Place the top bun on each burger and serve.