Vegan 1-Pan Mushroom Potato Casserole with Herbed Garlic Butter

Vegan 1-Pan Mushroom Potato Casserole with Herbed Garlic Butter


Cozy One-Pan Vegan Mushroom Potato Casserole

Embrace the warmth of fall with this delightful vegan recipe for a mouthwatering Mushroom Potato Casserole! This cozy dish comes together easily—using just one pan—making it perfect for those laid-back evenings. Picture rich mushroom gravy bursting with savory beans and tender veggies, all topped with crispy garlic herb potatoes. Simple, wholesome, and comforting—what more could you ask for?

Mushroom Potato Casserole

Why You’ll Adore This Vegan Casserole

  • All-In-One Wonder: No need for multiple pots and pans; everything cooks together seamlessly.
  • Minimal Effort: Just toss your ingredients into a baking dish, and let the oven do the magic!
  • Nutrient-Packed Comfort: Enjoy cozy flavors reminiscent of classic comfort foods without the hassle.
  • Diet-Friendly: Naturally nut-free, with gluten-free and soy-free adjustments available!

Ingredients to Gather

  • Veggies: Gather fresh mushrooms, onions, carrots, and a whole head of garlic, along with some celery and potatoes for now.
  • Oils: A splash of olive oil and/or vegan butter will add richness.
  • Flavor Boosters: Use red wine (or a blend of balsamic vinegar and veggie stock), herbs like thyme and sage, and spices such as garlic and onion powder.
  • Protein: A can of white beans (like cannellini or butter beans) really adds to the heartiness.
  • Gravy Base: Stock and cornstarch (or flour) thicken the dish beautifully.
  • Citrus Twist: A squeeze of lemon juice for that zesty touch atop the potatoes.

💡 Pro Tips

  • Prep While You Wait: Chop your celery and slice potatoes while the mushroom mixture is baking to save time.
  • Maximize Flavor: Don’t discard the small garlic pieces from the top of the garlic bulb—add them for extra garlicky goodness!

How to Create Your Mushroom Potato Casserole

  1. Preheat Your Oven: Get it going at 410°F (210°C). Grease a 10×13” baking dish.
  2. Chop & Prep: Dice your veggies, and cut off the top third of the garlic bulb to expose the cloves. Set aside those little garlic bits!
  3. Mix in the Dish: Combine the garlic bits, mushrooms, onion, carrots, 2 teaspoons of olive oil, salt, pepper, and red wine in the baking dish. Mix to coat everything evenly.
  4. Add the Garlic: Create a spot in the center for the garlic bulb, cut-side up. Drizzle the top with olive oil and cover the dish loosely with parchment paper.
  5. Bake Away: Pop it in the oven for about 40 minutes—aim for golden mushrooms and translucent onions. Stir if necessary!
  6. Combine the Goodness: Once baked, remove the garlic bulb, mix in your herbs, salt, tomato paste, and soy sauce. Then, add the celery and beans, plus the stock mixed with cornstarch, and stir well.
  7. Layer the Potatoes: Spread those sliced potatoes neatly on top.
  8. Make Garlic Butter: Squeeze out the roasted garlic cloves into a small bowl, mix with vegan butter or olive oil, oregano, lemon juice, and salt. Spread this creamy goodness over the potatoes, reserving a bit for later.
  9. Final Bake: Cover again with parchment, bake for 20 minutes, then uncover and bake for an additional 20-25 minutes until golden and crispy!
  10. Serve & Enjoy: Brush with your reserved garlic butter and sprinkle with fresh herbs. Perfect for enjoying on its own or paired with a refreshing side salad or crusty bread.

What Goes Well With This Casserole?

Whether you serve this luscious stew as-is or with a crisp salad, warm dinner rolls, or toasted sourdough, it’s sure to be a hit at the table!


This vegan recipe not only fills your home with cozy autumn scents but also nourishes your body and soul. Dive into this easy-to-make mushroom potato casserole, and savor the flavor of fall!




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