We tried the following a couple days ago, and they loved it. The only negative is, it's so moist, it falls apart on the grill.
**Perfect Burgers**
Source:
http://www.instructables.com/
2 pounds ground beef (80-90% lean - if you use leaner beef cooking times may vary)
1/4 cup Italian seasoned breadcrumbs
1 egg, beaten lightly
2 tbsp barbecue sauce (Sweet Baby Ray's Original)
2 tbsp ketchup
Your favorite hamburger seasoning (I really like Weber's Burger seasoning for convenience, but you can also make your own by mixing salt, pepper, garlic, onion powder, paprika, and seasoned salt together)I used McCormick's Grill Mates Hamburger Seasoning.
Steps
Mix ingredients in a large bowl.
Make patties NO THICKER than 3/4" for even cooking
Poke a hole through the center of each patty so the center will be done and they won't rise up in the middle when cooking.
Grill over medium coals - Sear on both sides, then move off heat to finish.
Watch for flare-ups!
Notes
When we tried these for the first time, they tasted great, but were very moist and wanted to fall apart on the grill. Next time, we'll cut the bbq sauce and ketchup in half. It would also help if they were frozen before grilling.
Wish they had included a recipe for the Weber's Burger Seasoning instead of just the ingredients.