Mix hamburger in bowl with black pepper, bread crumbs and eggs.
Thoroughly mix meat.
White Castle Burger Recipe Onions
Finely chop onion and spread evenly over 13×9 baking pan.
White Castle Burger Recipe Holes
Spoon portions of hamburger on top of onions. Evenly spoon meat around top of onions. Pat meat evenly on top of onions to cover entire pan. Then with straws poke holes close and evenly over entire meat. This allows the onion juice to rise through the meat, just as they do at White Castle.
Place in pre-heated oven at 400 F (bake) for 20 mins
White Castle Burger Recipe Cheese
Remove to add cheese if you want it.