Set these before church and came home to potatoes so creamy my mother-in-law asked if I added something fancy. I didn't.

These 3-ingredient slow cooker Sunday service silk whipped potatoes are the kind you set before church and come home to like a little miracle. I grew up in a small Midwestern town where the slow cooker earned its place on the counter every Sunday morning, especially in the colder months. Using peeled, cubed Kennebec potatoes gives these mashed potatoes that old-fashioned, diner-style creaminess without needing anything fancy. They’re simple, comforting, and smooth as silk, the sort of potatoes that make a mother-in-law raise an eyebrow and ask what you snuck into them—when it’s really just time, good potatoes, and a little patience.

Serve these silk whipped potatoes in a warm ceramic bowl with a generous pool of melted butter in the center and a sprinkle of fresh chives over the top. They’re perfect alongside pot roast, baked ham, roast chicken, or meatloaf, and they soak up gravy like a dream. Add a simple green vegetable—peas, green beans, or a tossed salad—and some soft dinner rolls to round out a classic Sunday supper. Leftovers reheat nicely and make a lovely bed for leftover roast or a fried egg the next morning.

Servings: 6–8

4 pounds Kennebec potatoes, peeled and cut into 1 1/2-inch cubes

Prep the potatoes: Peel the Kennebec potatoes and cut them into even 1 1/2-inch cubes so they cook at the same rate. Rinse briefly under cool water and drain well to remove excess surface starch without making them watery.

Load the slow cooker: Place the cubed potatoes into a 5- to 6-quart slow cooker. Sprinkle with 1 1/2 teaspoons kosher salt. Dot the potatoes with the 8 tablespoons butter pieces, tucking some down between the cubes so it melts throughout.

Add milk and set to cook: Pour 1 cup of the warmed whole milk over the potatoes (reserve the remaining 1/2 cup for later adjusting). Cover the slow cooker with the lid.

Cook low and slow: Cook on LOW for 6–7 hours, or until the potatoes are very tender and easily crushed with the back of a spoon. Avoid lifting the lid more than once or twice, as that releases heat and slows cooking.

Warm remaining milk: About 15 minutes before mashing, gently warm the remaining 1/2 cup milk (on the stovetop or in the microwave) until just warm to the touch. Warm milk blends more smoothly and helps keep the potatoes silky instead of gluey.

Whip the potatoes: Turn the slow cooker to WARM or OFF. Using a potato masher, mash the potatoes right in the crock until there are no large chunks. Then, using a hand mixer on LOW speed, slowly beat the potatoes while drizzling in the remaining warm milk a little at a time until they are very smooth and silky. Stop as soon as they reach your desired creaminess to avoid overworking them.

Adjust seasoning: Taste and add more salt if needed, along with freshly ground black pepper if you like. If the potatoes seem too thick, add a splash more warm milk and gently beat on LOW just until incorporated.

Hold for serving: Smooth the top of the potatoes in the slow cooker or transfer to a warm ceramic serving bowl. If holding in the slow cooker, keep on WARM with the lid slightly askew so condensation doesn’t drip back in and thin the potatoes. Just before serving, make a shallow well in the center, add a few extra pats of butter so they melt into a little pool, and sprinkle with chopped fresh chives.

Serve: Bring the bowl to the table while the butter is still melting in the center. Serve hot alongside your Sunday roast, ham, or chicken, spooning from the creamy middle so everyone gets a taste of that buttery pool.

To keep this true to its spirit, the base is just potatoes, milk, and butter, but there are gentle ways to make it your own. For extra richness, you can swap half of the milk for heavy cream or evaporated milk, though in my experience Kennebec potatoes become wonderfully creamy even with just whole milk. If you need to keep the recipe strictly to three ingredients, count only the potatoes, milk, and butter as the core, and treat salt, pepper, and chives as optional pantry extras. For a slightly tangy farmhouse flavor, stir in a few tablespoons of sour cream or plain yogurt at the very end, beating just enough to blend. Garlic lovers can tuck 3–4 peeled garlic cloves in with the potatoes at the start so they soften and mash right in, giving a gentle garlic note without any harsh bite. For a lighter texture, you can use a potato ricer instead of a hand mixer: rice the hot potatoes into a large bowl, then slowly beat in the warm milk and butter mixture with a wooden spoon. If you need to make these ahead, refrigerate the whipped potatoes in a covered dish, then reheat gently in the slow cooker on LOW with a splash of milk, stirring occasionally, until hot and smooth—adding a fresh pat of butter before serving to restore the gloss. Food safety tips: Do not leave cooked potatoes sitting in the slow cooker turned off at room temperature for more than 2 hours; bacteria can grow in that warm, starchy environment. Always keep the slow cooker on WARM if holding for service, and refrigerate leftovers within 2 hours in shallow containers so they cool quickly. Reheat leftovers to steaming hot (165°F/74°C) before serving, and discard any potatoes that have been left out too long or show signs of spoilage such as an off smell or unusual texture.