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+ servings
bowl of slow cooker mashed potatoes with rosemary sprig on top

Slow Cooker Buttermilk Mashed Potatoes

Slow Cooker Mashed Potatoes are creamy and delicious, with the flavors of garlic, rosemary and tangy buttermilk! They're an easy side dish that's naturally gluten-free and the entire family will love it!

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  • 3 lbs. yukon gold potatoes peeled and chopped into 1" cubes
  • 3/4 cup low sodium chicken stock may substitute with vegetable stock
  • 3 cloves garlic smashed
  • 1 teaspoon salt plus more to taste
  • 1 1/4 cup buttermilk warmed slightly (not hot) (I used 1 1/4 cups)*
  • 4 tablespoons unsalted butter softened
  • 1 tablespoon freshly chopped rosemary or 1 teaspoon dried


  • Grease your slow cooker with cooking spray.  Place the potatoes, stock, garlic, and salt into the slow cooker and stir. Cook on low for about 4-6 hours or until tender.
  • Add the warmed buttermilk slowly, followed by the butter and rosemary, and mash with a potato masher until the potatoes reach the desired consistency.  Season with salt and pepper to taste.
  • Serve immediately or keep on warm in the slow cooker until ready to serve.  Enjoy!


  • Pro tip: No buttermilk? It's easy to make your own! Simply add a tablespoon of fresh lemon juice to regular milk and let stand for 10 minutes.
  • All slow cookers are different, so the first time you try making mashed potatoes in your slow cooker you should keep a close eye on them.  I suggest checking for doneness after 3 hours on low and even stirring them occasionally.  Also, add a bit more liquid if it evaporates too quickly.
  • I've only cooked my potatoes on low and wouldn't advise cooking them over high heat unless you're prepared to check them often to prevent scorching.
  • Warm the buttermilk prior to adding to the hot potatoes to prevent curdling.  It should be a bit warmer than lukewarm, not hot.
  • Customize this recipe to your liking — anything goes!


Calories: 305kcal, Carbohydrates: 51g, Protein: 8g, Fat: 9g, Saturated Fat: 5g, Polyunsaturated Fat: 3g, Cholesterol: 22mg, Sodium: 603mg, Fiber: 5g, Sugar: 5g

Nutrition is estimated using a food database and is only intended to be used as a guideline for informational purposes.

Did you try this recipe?Be sure to tag @flavorthemoments with the hashtag #flavorthemoments on Instagram so I can see what you made!