Preheat oven to 400℉. Place bacon a foil-lined sheet pan. Bake 18-22 minutes or until preferred crispiness. Transfer to a paper towel lined plate to drain any excess grease.
Heat a large skillet, cast-iron skillet, or griddle over medium-high heat until smoking hot.
Season the ground beef balls with garlic powder, onion powder, salt, and black pepper.
Working in batches if needed, place each beef ball onto the hot skillet. Cook 1 minute, then press firmly into a thin patty with a flat spatula or burger press. Cook 2 minutes until the edges are deeply browned and crispy. Flip, immediately top with 1 slice of cheddar, and cook 2–3 minutes more until cheese is melted and preferred doneness is reached.
Wipe out the skillet, melt butter over medium heat, and toast the buns cut-side down until golden, about 1 minute.
Spread mayonnaise on the bottom bun. Add lettuce, then the smash patty with melted cheddar. Top with 2 slices of crispy bacon, then spoon 2 tablespoons of Fischer & Wieser Bacon & Apple Jam generously over the top. Place the top bun on and serve immediately.