These cozy green bean casserole stuffed mushrooms take everything you love about that classic holiday casserole — the creamy sauce, the tender green beans, the crunchy onion topping — and pack it all into a bite-sized mushroom cap. It’s comfort food in its most portable, snackable form.
You can assemble these mushrooms up to 24 hours ahead of time. Just fill them, top with the onions, and refrigerate on the baking sheet covered with plastic wrap. When ready to bake, add 5 to 7 minutes to the cooking time. For a vegan version, use dairy-free cream of mushroom soup, vegan cheddar, plant-based sour cream, and vegan Parmesan. For gluten-free, use gluten-free cream of mushroom soup and gluten-free crispy fried onions (French’s original are gluten-free).
Keywords: green bean casserole, stuffed mushrooms, appetizer, holiday, Thanksgiving, Christmas, comfort food, easy, quick