Preheat the oven to 375°F and lightly coat a 12-cup muffin tin with cooking spray.
Cook the bacon in a skillet over medium heat until crisp. Drain on paper towels and crumble into small pieces.
In a mixing bowl combine the ground beef, crumbled bacon, 1/4 cup BBQ sauce, breadcrumbs, egg, onion, garlic powder, salt, and black pepper. Mix just until evenly blended.
Divide the mixture evenly among 8 muffin cups and press down gently to fill each one.
Brush the tops of each muffin with the remaining 1/4 cup BBQ sauce.
Bake for 20 to 25 minutes until the internal temperature reaches 160°F. Let the muffins rest in the tin for 5 minutes before removing.