My sister showed me this trick for the perfect side dish. Just 4 ingredients wrapped up and tossed in the pot. The incredible smell filling the kitchen is just a bonus.

This is one of those little kitchen tricks that makes you wonder why you ever fussed with fancy side dishes. My sister actually showed me this method: you wrap everything up in foil packets, toss them right into the slow cooker, and let them turn into cheesy, buttery potato perfection while you go live your life. It’s just four ingredients, zero babysitting, and the smell that fills the kitchen is honestly half the reason I make them. These Parmesan butter potato packets are perfect for busy weeknights, potlucks, or anytime you want a cozy, hands-off side that feels special without any extra work.

These slow cooker Parmesan butter potato packets go with just about anything off the grill or out of the oven: grilled chicken, steak, pork chops, burgers, or even simple baked fish. I like to serve them right in the foil packets so everyone can open their own little bundle at the table. Add a green salad, steamed broccoli, or roasted asparagus to round things out, and maybe some crusty bread to soak up any extra buttery goodness. They also travel well for family gatherings—just keep them warm in the slow cooker and let people grab a packet when they’re ready to eat.

Servings: 4

2 pounds baby potatoes, scrubbed and halved (or quartered if large)

Prep the slow cooker and foil: Tear off 4 large sheets of heavy-duty aluminum foil, each about 12–14 inches long. Lightly crimp the edges up a bit to form shallow “trays” so the butter doesn’t run off while you’re assembling. Set them on the counter. Make sure your slow cooker insert is clean and dry.

Season the potatoes: Add the halved baby potatoes to a large mixing bowl. Drizzle the melted butter over the top, then sprinkle in the grated Parmesan and salt. Toss well until every potato piece is coated in the buttery, cheesy mixture.

Fill the foil packets: Divide the buttered Parmesan potatoes evenly among the 4 foil sheets, piling them into the center of each. Scrape any leftover butter and cheese from the bowl over the tops of the potatoes so you don’t waste any flavor.

Wrap the packets tightly: Bring the long sides of each foil sheet up over the potatoes and fold them together to seal, then roll up the shorter ends tightly to make snug packets. You want them sealed well so the steam and buttery Parmesan stay inside while they cook.

Arrange in the slow cooker: Place the foil packets seam-side up into the slow cooker in a single layer if possible, or slightly overlapping if needed. They should fit snugly but not be smashed.

Cook until tender: Cover with the lid and cook on HIGH for 2 1/2–3 hours or on LOW for 4–5 hours, or until the potatoes are fork-tender. The exact time will depend on your slow cooker and how big you cut the potatoes.

Finish and serve: Carefully lift the hot foil packets out of the slow cooker with tongs. Open each packet away from your face to avoid the steam. Sprinkle a little extra grated Parmesan over the top of the potatoes while they’re still hot, then serve the packets directly on plates or tip the potatoes into a serving bowl if you prefer.

Use this as a flexible base and tweak it to fit your weeknight plans. For extra flavor without adding more ingredients, swap the plain salt for a seasoned salt or a garlic salt. If you want a slightly crispier top, you can open the cooked packets and slide them under the broiler on a baking sheet for 2–3 minutes to brown the cheese. Mix up the potatoes by using small red potatoes, Yukon golds, or even fingerlings—just keep them in bite-size pieces so they cook evenly. If you’re cooking for a crowd, you can double the recipe and stack the foil packets in the slow cooker; just add about 30 minutes to the cook time and rotate the top and bottom packets halfway through if you can. To make cleanup even easier, line the bottom of the slow cooker with an extra piece of foil before adding the packets, especially if you’re transporting them to a potluck. And if you like a touch of freshness, sprinkle chopped fresh parsley or chives on top right before serving—still only four main ingredients in the packets, but a pretty finish on the plate.