Colin FosterBy Colin Foster

Updated November 2026

A crock pot mashed potatoes recipe lets you cook, mash and hold a full batch of potatoes with almost no stovetop time. You will end up with smooth, buttery mashed potatoes that stay warm on the “warm” setting until dinner. The method takes about 4 to 5 hours on low, with about 15 minutes of hands-on work.

Ingredients and Tools You Need

Use a 6-quart slow cooker for about 3 pounds of potatoes. Russets give the fluffiest texture, while Yukon Golds produce a creamier, more buttery mash. Gather these items before you start:

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  • 3 pounds russet or Yukon Gold potatoes, peeled and cut into 2-inch chunks
  • 4 to 6 tablespoons unsalted butter, cut into pieces
  • 1 cup whole milk, warmed, plus more as needed
  • 1/2 cup sour cream or heavy cream (optional, for richness)
  • 1 1/2 teaspoons kosher salt, plus more to taste
  • 1/2 teaspoon black pepper
  • 1 1/2 cups water or low-sodium chicken broth, for the base
  • Potato masher or hand mixer

Step-by-Step Method

Step 1: Prep the Potatoes

Peel the potatoes and cut them into even 2-inch chunks so they cook at the same rate. Rinse them briefly to remove surface starch, then drain well. Uneven pieces are the most common reason for a mix of mushy and firm bites.

Step 2: Load the Slow Cooker

Place the potatoes in the crock and add the water or broth. The liquid should come about halfway up the potatoes. Add the salt, then tuck the butter pieces over the top.

Step 3: Cook on Low

Cover and cook on low for 4 to 5 hours, or on high for 2 to 2 1/2 hours. The potatoes are done when a fork slides through a chunk with no resistance. Avoid lifting the lid often, since each peek drops the temperature and adds time.

Mashing and Finishing for Smooth Texture

Drain off most of the liquid before mashing, reserving about 1/4 cup in case you need it. Mash the potatoes right in the crock with a masher, or transfer them to a large bowl and beat with a hand mixer for a silkier texture. Add the warm milk a little at a time, then stir in the sour cream or cream if using. Taste and adjust the salt and pepper. The goal is a thick but spoonable consistency, so add more warm milk only if they look stiff.

Holding and Serving Your Mashed Potatoes

Once mashed, switch the slow cooker to the “warm” setting and cover. The potatoes will hold well for up to 2 to 3 hours. Stir every 30 minutes, and add a splash of warm milk if they start to thicken or form a skin. Avoid holding them longer than that, since the texture turns gluey and the flavor dulls.

Common Mistakes and Tips

  • Cutting the potatoes unevenly. Mixed sizes cook unevenly and leave some pieces hard.
  • Adding cold milk. Cold dairy cools the potatoes and makes them gummy. Warm it first.
  • Overmixing. Beating too hard with a mixer releases starch and creates a sticky texture. Mash gently.
  • Using too much liquid. Drain thoroughly before mashing so the potatoes don’t turn watery.
  • Forgetting to season in stages. Add salt during cooking and taste again after mashing.
  • Slow cooker with a removable insert. A removable crock makes cleanup easier and lets you move the potatoes to a serving dish. View on Amazon
  • Stainless steel potato masher. A sturdy masher with a wide head works well right in the crock. View on Amazon
  • Hand mixer. Useful when you want an ultra-smooth, whipped texture. View on Amazon

FAQ

Can I make crock pot mashed potatoes ahead of time?

Yes. Make them up to a day ahead, refrigerate, then reheat on low in the slow cooker for 2 to 3 hours, stirring occasionally and adding milk as needed.

Do I need to peel the potatoes?

Peeling gives the smoothest texture, but you can leave the skins on Yukon Golds or red potatoes for a rustic mash. Scrub them well first.

Why are my slow cooker potatoes watery?

They likely held too much cooking liquid. Drain thoroughly before mashing, and add warm milk gradually so you control the consistency.

Conclusion

This crock pot mashed potatoes recipe frees up your stove for the rest of dinner while keeping the potatoes warm and ready. Start with evenly cut potatoes, warm your dairy, and hold the finished mash on warm for no more than a few hours. For more hands-off sides and mains, browse our Crock Pot Meal Ideas roundup. Crock Pot Meal Ideas: 12 Easy Slow Cooker Dinners for Busy Weeks

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Colin Foster

About Colin Foster

Colin Foster is part of our editorial team and reviews and edits our home cooking with appliances guides, checking product details against manufacturer specifications and owner feedback.