Mom deserves something this creamy and rich. I set it before church and came home to the most decadent side dish I've ever made.

This four-ingredient slow cooker Gruyère potato dish is exactly the kind of creamy, rich comfort food I want waiting for me after church on Mother’s Day. It borrows the spirit of a classic French gratin—thin-sliced potatoes, nutty Gruyère, and real cream—but leans on the slow cooker so you can set it and walk away. By the time you come home, the potatoes are silky-tender, the edges are bubbling and golden, and the whole kitchen smells like you’ve had something in the oven all morning, even though the appliance did the work.

Serve these Gruyère potatoes as a centerpiece side dish alongside simple roasted or grilled meats—roast chicken, seared pork chops, or a sliced beef roast all work beautifully. A bright green vegetable, like steamed green beans with lemon or a crisp salad with a light vinaigrette, helps balance the richness. For brunch, pair with soft scrambled eggs, fruit salad, and a basket of warm rolls. A dry white wine, such as a Sauvignon Blanc or unoaked Chardonnay, complements the nutty cheese and cream if you’re pouring something special.

Servings: 6

2 1/2 pounds fingerling potatoes, very thinly sliced (about 1/8 inch)

Lightly grease a 5- to 6-quart oval slow cooker with a bit of neutral oil or butter to help prevent sticking and promote even browning around the edges.

Rinse the fingerling potatoes and pat them dry. Using a sharp knife or mandoline, slice them very thinly, about 1/8 inch thick. Thin slices are important so they become tender and creamy by the time you return.

In a large bowl, combine the sliced potatoes with the kosher salt. Toss gently with your hands to distribute the salt evenly throughout the slices.

Pour the heavy cream over the salted potatoes and toss again, making sure every slice is lightly coated. This mixture will become the base of the rich, silky sauce as it cooks.

Sprinkle 1 1/2 cups of the shredded Gruyère into the bowl with the potatoes and cream. Toss just until the cheese is evenly distributed among the slices; it doesn’t need to be perfectly mixed.

Transfer the potato mixture to the prepared slow cooker, spreading it into an even layer and smoothing the top slightly so it cooks uniformly.

Sprinkle the remaining 1/2 cup Gruyère evenly over the top. This layer will melt, bubble, and form that golden, slightly crisped cheese crust you want for a decadent finish.

Cover the slow cooker with its lid and cook on LOW for 4 1/2 to 5 hours, or until the potatoes are completely tender when pierced with a knife and the edges are bubbling and golden. Do not stir during cooking; leaving the layers undisturbed helps the gratin set and the top brown around the sides.

If you’d like a deeper golden top, you can remove the ceramic insert (if it’s oven-safe) and place it under a preheated broiler for 3 to 5 minutes, watching closely until the cheese is browned to your liking.

Let the potatoes rest, covered, for about 10 minutes before serving. This brief rest allows the creamy sauce to thicken slightly so each spoonful lifts out in a cohesive, cheesy scoop—perfect to set on the table as a rich, celebratory Mother’s Day side dish.

For extra flavor without adding more ingredients, you can use smoked Gruyère in place of regular Gruyère, which lends a subtle, ham-and-cheese casserole aroma to the dish. If you’d like a touch of sharpness, swap in up to 1/2 cup of aged Swiss or Parmesan for part of the Gruyère while keeping the total cheese amount the same. To lighten the dish slightly, you can replace up to 1/2 cup of the heavy cream with whole milk; avoid going beyond that, as the sauce may become thin and less silky. A pinch of freshly ground black pepper or a light grating of nutmeg over the top before cooking also pairs beautifully with Gruyère if you’re willing to stretch beyond four ingredients. For food safety, keep the potatoes refrigerated until you’re ready to slice, and refrigerate leftovers within 2 hours of cooking in shallow containers so they cool quickly. Reheat leftovers thoroughly until steaming hot (165°F / 74°C) before serving. If using a programmable slow cooker with a warm setting, avoid holding on WARM for more than 2 hours after cooking to keep the texture at its best and minimize food safety risks. Always cook on LOW for this recipe; a HIGH setting can cause the cream to separate and the edges to scorch before the centers are tender.