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Here is a recipe that combines two of my favorite things: Sour cream and onion flavor + mashed potatoes. The end result, Sour Cream and Onion Potato Bake, is just heavenly.

Sour Cream and Onion Potato Bake

Growing up in the south, I’ve been taught to put things in a casserole dish and serve it so that it is hot and bubbly. Especially when the fall/winter weather rolls around and you’re attending gatherings for Thanksgiving, Christmas, and the holiday season. Here is a great one to make ahead and just pop in the oven at whatever party you are going to. [Just do steps 1-9 and finish in the oven when you get there]. It takes everyone’s favorite side dish (mashed potatoes) and amps them up with a fantastic and fun flavor of sour cream and onion. 

Sour Cream and Onion Potato Bake

Even though this Sour Cream and Onion Potato Bake are a show stopper, they aren’t *so crazy* in flavor that you can’t serve them on your holiday table. They won’t overpower your other dishes and instead, they’ll just surprise everyone and get them excited about the new spin on potatoes this year. 

If you love this recipe, try these other potato recipes: Herbed Hassleback Potatoes, Whole30 Scalloped Potatoes, Greek-Style Potatoes.

5 from 12 votes

Sour Cream and Onion Potato Bake

Prep: 15 minutes
Cook: 15 minutes
Baking Time: 15 minutes
Total: 45 minutes
Servings: 8 people


  • 3 lb russet potatoes, peeled and cut
  • 1 tbsp + 2 tsp kosher salt
  • 4 tbsp salted butter
  • 2 cups yellow onion, thinly sliced (or one medium onion)
  • 3 cloves garlic, minced
  • 2 tsp white vinegar
  • 1 cup low-fat sour cream
  • 1/4 cup low-sodium chicken broth
  • 1/2 tsp freshly cracked pepper
  • 1/2 cup freshly chopped chives (reserve 1/4 for topping)
  • 1/2 cup mild cheddar cheese


  • Preheat oven to 375 degrees.
  • Place cut potatoes into a large pot and fill with water so that it is just covering potatoes by 2 inches. Bring to a boil.
  • Once boiling, add 1 tbsp of the salt and continue to boil until potatoes are fork-tender, about 10 minutes.
  • Meanwhile, heat a large skillet over medium heat with 2 tbsp of the butter. Add onion and garlic then cook, stirring, until the onions are tender, 4 to 6 minutes.
  • When potatoes are tender, strain and let steam escape a the colander for about 5 minutes, allowing excess water to drain [this prevents the potatoes from not tasting watery].
  • Place potatoes in a large bowl and add the sour cream, white vinegar, chicken broth, pepper, 1/4 cup of the chives, and 2 tbsp of butter.
  • Using a potato masher, mash until potatoes are your desired consistency. [For this recipe, I prefer mine a little lumpy.]
  • Once mashed, stir in the onion mixture with black pepper and 2 tsp of kosher salt.
  • Add the potatoes into an oven-safe dish and sprinkle with cheese.
  • Place into the oven, uncovered until cheese is lightly browned, 10 to 15 minutes.
  • Once browned, top with remaining chives, serve and enjoy!

Nutrition information is automatically calculated, so should only be used as an approximation.

Additional Info

Servings: 8 people

Welcome! I’m Alex.

I’m a food lover sharing healthy, simple, delicious, recipes from my kitchen to yours. Here you’ll find lots of Whole30, lots of healthy, and a little indulgence here and there because…it’s all about balance y’all!

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Recipe Rating


  1. 5 stars
    Made these potatoes as a side dish for our Christmas dinner and my husband & I cannot stop obsessing over how delicious they were!!!! Definitely will be making this recipe for every holiday/special occasion going forward!!

    1. 5 stars
      This was just so delicious! I had some triple cream Brie cheese which I sliced thinly on top of the potato along with some grated Parmesan. Mmhmmmh. So glad I found your recipe site! Thanks.

  2. 5 stars
    wow these are so good! We made them for thanksgiving along side the brisket from your cookbook! It was delicious! I pureed the sauteed onions for the mashed potatoes which sounds weird but my husband would not have liked seeing the pieces of onions mixed in. I didn’t want to miss out on the flavor so I put them in the food processor with a little extra broth and they mixed in great! This might be my new go to mashed potatoes!