My daughter's graduation party is next weekend and I just found the dish that's feeding fifty people without breaking a sweat.

This 4-ingredient slow cooker graduation party cheesy scalloped potatoes recipe is exactly what I’m making for my daughter’s big day because it quietly feeds a crowd while I’m off refilling drink coolers and taking photos. Instead of juggling pans of potatoes in the oven, everything bakes low and slow in one big oval slow cooker, turning thin-sliced russet potatoes into a creamy, golden, cheesy casserole. It’s very Midwestern at heart—simple ingredients, cozy flavor, and no fancy techniques—just straightforward comfort food scaled up to keep fifty people happily scooping.

Serve these cheesy scalloped potatoes straight from the slow cooker on the buffet so they stay warm and creamy. They’re perfect next to pulled pork or shredded BBQ chicken sandwiches, grilled brats or burgers, sliced ham, or roast beef. Add a big green salad, a bowl of coleslaw, and maybe a fruit tray to balance out the richness. For a graduation party, I like to set out hot sauce, extra shredded cheese, chopped green onions, and bacon bits so guests can dress up their own scoop.

Servings: 50

15 pounds russet potatoes, scrubbed and very thinly sliced (about 1/8 inch)

Prep the slow cooker: Lightly grease a large oval slow cooker (7–8 quarts) with nonstick spray or a thin layer of butter. This helps the cheesy edges release easily and makes cleanup a lot less stressful after the party.

Slice the potatoes: Scrub the russet potatoes well and pat them dry. Using a mandoline or a sharp knife, slice the potatoes very thin, about 1/8 inch thick. Try to keep the slices even so they cook at the same rate. Do not soak the slices in water—starch helps the sauce thicken and stay creamy.

Make the simple cheese mixture: In a large bowl or directly in a big measuring pitcher, whisk the heavy cream (or half-and-half) with the kosher salt until the salt is mostly dissolved. Stir in the cubed processed cheese. It won’t fully melt yet; you just want the cubes coated and the salt distributed so every layer gets flavor.

Layer the potatoes and cheese: Add a generous, even layer of sliced potatoes to the bottom of the greased slow cooker, overlapping slightly like shingles. Scatter a handful of cheese cubes over the potatoes, then ladle some of the cream mixture over the top. Repeat layering potatoes, cheese cubes, and cream until you’ve used everything, finishing with a layer of potatoes and plenty of cheese and cream on top. Gently press down with a spatula to settle the layers and help the cream work its way through.

Cook low and slow: Cover the slow cooker with the lid. Cook on HIGH for 4 to 5 hours or on LOW for 7 to 8 hours, until the potatoes are very tender when pierced with a fork and the edges are bubbling and golden. Try not to lift the lid more than once or twice, especially early on, because you’ll lose heat and add extra time.

Check and adjust seasoning: About 30 minutes before serving, carefully lift the lid and stir just around the edges and down the center to pull some of the melty cheese and cream through the layers without completely breaking them up. Taste a small bite (careful, it’s hot) and add a pinch more salt if needed, stirring gently into the top layer.

Hold warm for the party: Once the potatoes are fully tender and the sauce is thick and cheesy, switch the slow cooker to the WARM setting. The potatoes can hold like this for 1 to 2 hours. Before guests arrive, use a spoon to scoop up a portion and make sure the texture is still creamy. If it seems too thick, stir in a small splash of warm cream to loosen.

Serve for a crowd: Set the slow cooker on the buffet with a sturdy serving spoon. Give the potatoes a gentle stir around the edges so everyone sees that golden, cheesy pull when the first scoop comes out. Keep the lid partially on between guests to hold in heat while still making it easy for people to serve themselves.

Make-ahead tip: You can thin-slice the potatoes up to 3 hours ahead and keep them covered in the fridge, tightly wrapped in plastic or in a large zip-top bag with most of the air pressed out. Don’t soak them in water or you’ll wash off the starch that helps thicken the sauce. For the absolute least stress on party day, layer everything in the slow cooker crock the night before, cover, and refrigerate. Pull it out 30 minutes before cooking to take the chill off, then cook as directed, knowing it may need an extra 30–45 minutes because it started cold. Cheese options: Processed cheese melts super smoothly and is very forgiving for long buffet times, which is why it’s great for a big graduation party. If you prefer, you can swap half of it for shredded sharp cheddar or Colby Jack for more classic cheesy flavor, but stick with at least half processed cheese to keep the sauce from getting grainy. Smaller batch: Feeding a smaller group? Halve the recipe and use a 5–6 quart slow cooker. The cook time will be similar; start checking for tenderness about 30 minutes earlier. Add-ins without adding stress: If you want to dress this up a bit but still keep it simple, you can sprinkle in cooked, crumbled bacon between layers, or add 2–3 teaspoons of garlic powder and 1–2 teaspoons of black pepper to the cream mixture. Chopped fresh parsley or sliced green onions over the top right before serving make it look extra festive without any extra work during cooking. Food safety tips: For a big event like a graduation party, keep these potatoes at a safe serving temperature. Once they’re done, leave the slow cooker on WARM and keep the lid mostly on so the internal temperature stays at or above 140°F (60°C). If the slow cooker has been off for more than 2 hours and the potatoes have been sitting at room temperature, they should be discarded to avoid foodborne illness. Always start with clean, scrubbed potatoes and a clean slow cooker. Use a sharp, clean mandoline or knife, and be careful of your fingers when slicing very thin. If you’re prepping ahead, keep the uncooked, layered crock refrigerated and covered, and don’t leave raw potatoes sitting out at room temperature for more than 2 hours. When reheating leftovers, heat them to at least 165°F (74°C) before serving.