🧾 Ingredients
- 2½–3 lbs (about 1.1–1.4 kg) potatoes, thinly sliced (Yukon Gold or russet work well)
- 1 packet (1 oz) French onion soup mix
- 1 cup sour cream
- 1 can (10.5 oz / ~300 g) cream of mushroom soup
- 1½ cups shredded cheddar cheese
🔪 Instructions
- Prep the potatoes
Wash, peel (optional), and thinly slice the potatoes (about ⅛–¼ inch thick). - Mix the sauce
In a bowl, combine the French onion soup mix, sour cream, and cream of mushroom soup until smooth. - Layer in slow cooker
Lightly grease your slow cooker. Add a layer of potatoes, then spread some of the sauce over them. Repeat layers until everything is used. - Add cheese
Sprinkle shredded cheese evenly over the top (or between layers if you prefer extra cheesiness throughout). - Cook
- LOW: 6–7 hours
- HIGH: 3–4 hours
Potatoes should be tender when pierced with a fork.
- Serve
Let sit for 5–10 minutes before serving to thicken slightly.
💡 Tips & Variations
- Add sliced onions or sautéed onions for deeper flavor.
- Mix in cooked bacon bits for a smoky twist.
- Swap cheddar for Gruyère for a more classic French onion flavor.
- For a crispier top, transfer to an oven-safe dish and broil for a few minutes at the end.