Ingredients:
1/3 pound 80/20 ground chuck per burger
Cheddar or American cheese
Slices Portabella Mushrooms
Chopped Onion
Salt and pepper to taste
Saute the onions and mushrooms until they are soft.
Make 1/2 pound into balls. Split the balls into half and press each half until it is about 1/4” thick.
Place the second patty on top of the first and press the edges together. Make sure there are not any gaps for the cheese to escape. The toothpicks are so we can tell the difference between the types of burgers.
Grill at 400° until desired doneness. For medium rare I cook the burgers 5 to 6 minutes a side. Turn once while cooking.