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Green bean Casserole Stuffed Mushrooms

Green Bean Casserole Stuffed Mushrooms turn leftovers into a fun and delicious holiday appetizer. And they couldn't be easier to make!
Course Appetizer
Prep Time 5 minutes
Cook Time 20 minutes
Total Time 25 minutes
Servings 16 mushroooms
Author Christin Mahrlig


  • 2 cups leftover green bean casserole
  • 1/4 cup French fried onions
  • 1/2 cup shredded cheddar cheese
  • 16 large white mushrooms, stems removed


  • Preheat oven to 400 degrees. Lightly grease a baking sheet or line it with parchment paper.
  • Combine green bean casserole, onions, and cheddar cheese in a medium bowl.
  • Spoon mixture into mushroom caps. If desired sprinkle a few more onions on top.
  • Bake for 20 to 22 minutes.