Cheddar Ranch Mushroom Scalloped Potatoes: Crockpot Step-by-step instructions

Before you start

Before you start, make sure you have a 6-quart slow cooker and a mandoline or sharp knife for slicing the potatoes. Wash the potatoes well and pat them dry — no need to peel. Measure out the soup, ranch seasoning, cheese, and butter so they are ready to go.

You will also want a serving spoon and plates for when the dish is done. The slow cooker insert can be placed on the counter, and you can layer the ingredients directly in it.

Instructions

Layer and Top

1. 1Layer the Potatoes
   Place the sliced Yukon Gold potatoes in the slow cooker in overlapping layers, spreading them evenly across the bottom and up the sides. Press down gently to compact them slightly.
   Look for The potato slices should fill the bottom of the slow cooker in a thick, even layer.
   Tip For even cooking, keep the slices uniform in thickness, about 1/8 inch.
2. 2Add Soup and Seasoning
   Spoon the condensed cream of mushroom soup over the potatoes, spreading it as evenly as you can. Sprinkle the dry buttermilk ranch seasoning mix over the soup.
   Look for The soup and seasoning should cover the potato layer, though they will spread during cooking.
   Tip No need to stir; the slow cooker will blend the flavors as it cooks.
3. 3Top with Cheese and Butter
   Shower the shredded sharp cheddar cheese evenly over the top. Dot with the pats of salted butter, distributing them across the surface.
   Look for The cheese and butter should cover the top completely, creating a rich topping.
   Tip Cutting the butter into small pats helps it melt evenly.

At the end of this phase, the slow cooker contains a neat stack of potato slices, topped with a layer of soup and ranch seasoning, and finished with a generous blanket of shredded cheddar and pats of butter.

The ingredients should be evenly distributed, with the cheese covering the surface completely. The butter pats will melt into the cheese during cooking, creating a rich, golden crust.

Slow Cook

4. 4Cook on Low
   Cover the slow cooker and cook on low for 4 to 5 hours, until the potatoes are fork-tender and the cheese is melted and bubbly. Do not lift the lid during the first 3 hours of cooking.
   Look for The edges will be bubbling and the cheese will be golden, with steam rising from the center.
   Tip Resist the urge to stir; this helps the potatoes cook evenly and keeps the layers intact.

After cooking on low for 4 to 5 hours, the dish should be bubbling gently around the edges, with steam rising from the center. The cheese will have melted and formed a golden, slightly crispy top. The sauce will be creamy and aromatic, with a savory scent of mushroom, ranch, and butter. The potatoes should be fork-tender, and the whole dish will look irresistibly comforting.

Rest and Serve

5. 5Serve
   Once the potatoes are tender, turn off the slow cooker. Let the dish rest for 5 minutes, then scoop out generous portions onto plates. Serve hot.
   Look for The sauce should be creamy and thick, coating the potatoes, and the cheese crust golden.
   Tip For a crispy top, you can broil the casserole for 2-3 minutes after transferring to an oven-safe dish, if desired.

Once the slow cooker is turned off and the dish has rested for a few minutes, the sauce will settle and thicken slightly. Scooping out portions reveals tender potato coins coated in creamy sauce, with strands of melted cheddar stretching from the spoon. The dish should hold its shape on a plate, with the cheese crust intact. Serve hot, and enjoy the rich, savory aroma.

Common mistakes

A common mistake is lifting the lid to peek during cooking, which lets out heat and extends cooking time. Trust the process and wait at least 3 hours before checking. Another mistake is slicing the potatoes too thick, which can result in crunchy centers.

Aim for even, thin slices. Overcrowding the slow cooker with too many potatoes can also lead to uneven cooking, so stick to the recommended amount. Finally, resist stirring the dish — stirring can break up the potatoes and create a mushy texture.

How to tell it’s done

The dish is done when the potatoes are fork-tender: a fork inserted into the center meets no resistance. The cheese should be fully melted and bubbling at the edges, and the sauce should be creamy and slightly thickened.

If the potatoes are still firm after 4 hours, continue cooking in 30-minute increments until tender. The cheese may brown slightly on top, which adds flavor. Let the dish rest for 5 minutes before serving to allow the sauce to settle.