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Creamy Mushroom, Potato & Rice Casserole

Prep 15 min Cook 45 min Difficulty 2/5

Easy creamy mushroom, potato and rice casserole—simple layering, bake covered, then brown. Prep 15 min, bake ~55–65 min.

Why this recipe works

This creamy mushroom, potato & rice casserole is a straightforward, comforting one‑dish bake—thin potato slices layered with par‑cooked rice and sautéed mushrooms, soaked in milk and baked until tender. It suits home cooks who want a low‑effort, hearty side or vegetarian main.

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Key takeaways

Par‑cook the rice so it finishes tender in the bake.
Layer evenly and pour milk to just reach the layers for best texture.
Bake covered first, then uncover to brown the top.

Recipe guide

This creamy mushroom, potato & rice casserole is a straightforward, comforting one‑dish bake—thin potato slices layered with par‑cooked rice and sautéed mushrooms, soaked in milk and baked until tender. It suits home cooks who want a low‑effort, hearty side or vegetarian main.

A simple, comforting bake that combines potatoes, rice and mushrooms in a creamy, hands-off casserole.

  • Par‑cook the rice so it finishes tender in the bake.
  • Layer evenly and pour milk to just reach the layers for best texture.
  • Bake covered first, then uncover to brown the top.

Ingredients (serves 4)

400 g potatoes (thinly sliced), 150 g rice (rinsed), 500 ml milk, 250 g mushrooms (sliced), 1–2 tbsp oil or butter, salt and pepper, optional herbs (thyme or parsley) and grated cheese to finish.

Method

Preheat oven to 180°C (350°F). Par‑cook rinsed rice in boiling water 10 minutes; drain. Sauté sliced mushrooms in oil or butter until softened; season. Layer half the potato slices in a greased dish, scatter half the rice and mushrooms; repeat. Pour milk evenly so it reaches most layers, cover tightly with foil. Bake covered 40–50 minutes until potatoes are tender, remove foil and bake 10–15 minutes to brown. Rest 5–10 minutes before serving.

Tips & variations

Use short‑grain rice for creamier texture; adjust milk to just cover layers. Add onions or garlic with the mushrooms, fold in grated cheese before final bake, or swap part of the milk for cream for extra richness.

Ingredients

  • 400 g Potato
  • 150 g Rice
  • 500 ml Milk
  • 250 g Mushrooms

Instructions

  1. Preheat oven to 180°C (350°F).
  2. Thinly slice potatoes about 3–4 mm thick.
  3. Rinse rice under cold water.
  4. Par-cook rice in boiling water for 10 minutes, drain.
  5. Slice mushrooms thinly.
  6. Sauté mushrooms in a little oil or butter until softened and lightly browned, season with salt and pepper.
  7. Layer half the potatoes in a greased baking dish.
  8. Scatter half the par-cooked rice and half the mushrooms over the potatoes.
  9. Repeat layers with remaining potatoes, rice and mushrooms.
  10. Pour milk evenly over the casserole so it reaches most layers.
  11. Cover dish tightly with foil.
  12. Bake covered for 40–50 minutes until potatoes are tender.
  13. Remove foil and bake 10–15 minutes more to brown the top.
  14. Let rest 5–10 minutes before serving.

FAQs

Can I use raw rice instead of par‑cooking? Par‑cooking ensures rice cooks through; if using raw rice, increase oven time and add a little more liquid.
How can I make this dairy‑free? Swap milk for an unsweetened plant milk (oat or soy) and use oil instead of butter.
Can I prepare this ahead? Assemble and refrigerate covered for up to 24 hours, then bake as directed (add a few extra minutes if cold).