Prepare bacon using preferred cooking method (e.g. stove top, oven, or microwave); set aside to cool.
Sauté onion in a medium skillet in some of the remaining bacon grease until tender. Remove from heat.
Crumble bacon and combine with cooked onion and shredded American cheese in a small bowl.
Combine beef, pork, garlic powder, and steak sauce in a large bowl. Shape into 8 (¼-lb.) patties.
In 4 of the patties, create a small divot with your thumb; divide the bacon mixture among these 4 patties, packing it into the indentation. Top with the remaining patties and seal the edges.
Grill burger patties to desired level (e.g. medium, medium-well, etc.); let rest for 1-2 minutes.
To assemble each burger, place burger patty on the bottom bun. Top with ketchup, mustard, and chips to taste. Add top bun and enjoy!
Recipe adapted from: www.tasteofhome.com