Ingredients

  • 1 tablespoon butter
  • 1 pound ground beef
  • 3/4 teaspoon ground black pepper
  • 1/2 teaspoon onion powder
  • 1/2 teaspoon salt
  • 1 (10.75 ounce) can condensed cream of mushroom soup
  • 1/2 cup sour cream
  • 12 saltine crackers
  • 1 (10 ounce) box frozen chopped spinach, thawed and squeezed dry
  • 1 (4 ounce) package sliced button mushrooms, or more to taste
  • 4 slices Muenster cheese

Method

  • Preheat oven to 350 degrees F (175 degrees C). Rub butter all over a 2-quart baking dish.
  • Heat a large skillet over medium heat. Add ground beef, pepper, onion powder, and salt; cook and stir until browned, 5 to 8 minutes.
  • Mix cream of mushroom soup and sour cream together in a bowl.
  • Lay 6 saltine crackers in the bottom of the prepared baking dish. Top with 1/2 the ground beef. Dollop 1/3 of the mushroom soup mixture over beef. Lay remaining saltines on top. Cover with spinach and another 1/3 of the mushroom soup mixture. Spread remaining ground beef and mushroom soup mixture on top. Cover with mushrooms.
  • Bake in the preheated oven until bubbly, about 30 minutes. Top with Muenster cheese and continue baking until cheese is melted, about 5 minutes more.