4.75 from 12 votes

Twice-Baked Mashed Potatoes

By CarolPublished Nov 20, 2025

1 hr 45 mins

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Sharing my personal chef secrets for how I do mashed potatoes for clients so they reheat beautifully and stay light and fluffy. Twice-Baked Mashed Potatoes are smooth, creamy, slightly cheesy, garlicky, a little bit tangy, and a whole lot delicious. Best of all, no last-minute mashing frenzy while juggling a dozen other dishes. The perfect side dish for Beef Braciole, Italian Pot Roast, or Meatloaf Muffins!

“These mashed potatoes were a godsend this Thanksgiving. I’ve been taking them off the menu because it’s just too many sides to deal with. … I made this two days in advance and it couldn’t have been more delicious”

Twice-Baked Mashed Potatoes in white oval baking dish with serving spoon scooping some out.

Why This Recipe Is a Keeper:
How to Make Twice-Baked Mashed Potatoes:
Chef Tips and Tricks:
recipe faqs:
Variations:
Serve with:
More potato recipes you can make ahead!
Twice-Baked Mashed Potatoes Recipe

Why This Recipe Is a Keeper:

These Twice-Baked Mashed Potatoes are everything! They’re the way I made mashed potatoes for my personal chef clients over my 22-year career, so they’re well-tested! They’re indulgent yet practical, elevated yet comforting, and the kind of side dish that feels special without fuss.

This mashed potato casserole is:

The perfect make-ahead side! Make them 1 to 2 days ahead of your event and refrigerate. Then, pop them into the oven to bake and heat through so they’re ready when you are. Or, make them the day of your event and keep them hot in your slow cooker for up to two hours.
Versatile! Endlessly customizable, stir in cheese, herbs, roasted garlic, caramelized onions–whatever suits the meal you’re making.
Impressive! Twice-Baked Mashed Potatoes feel special, but the process is simple and reliable.
Not lumpy! A potato ricer removes any lumps.
Light and fluffy! Minimal stirring, processing, and twice-baking create a soufflé-like consistency and produce light, golden, crispy edges everyone will fight over!
So delicious! You may not even need gravy, but if you do, be sure to add my No-Drippings Gravy!

Put it all together, and you’ve got a make-ahead potato side that’s foolproof, elegant, and guaranteed to disappear fast. Once you try them as a mashed potato casserole, you’ll never make mashed potatoes any other way!

How to Make Twice-Baked Mashed Potatoes:

Recipe Ingredients:

Here’s everything you’ll need to make this twice-baked mashed potato recipe. See the recipe card below for the exact quantities.

Ingredients for Make-Ahead Mashed Potatoes.

Ingredient Notes and Substitutions:

Russet Potatoes: Russet potatoes are my favorite potatoes for mashed potatoes because of their high starch content. Yukon Gold or red will work but their “waxy” nature can get gummy a little too quickly.
Garlic: Fresh garlic is best but I have used a little garlic powder added to the melted butter in a pinch.
Butter: I always use unsalted butter in cooking because I can control the amount of salt.
Sour Cream: I use full-fat sour cream but light sour cream does work.
Cream Cheese: Here too, full-fat but light cream cheese (Neufchatel) does work. Let soften before using in the mashed potatoes.
Half-and-Half: I like half-and-half the best for mashed potatoes (half cream, half whole milk) and I always have it on hand because it’s what I put in my coffee.

Step-By-Step Instructions:

Gather and measure out all the ingredients.
Spray a 13 x 9-inch baking dish or two smaller dishes with cooking spray.
So that the potatoes don’t start discoloring before you get them all peeled, fill a pot with an estimated amount of cold water you think will cover the potatoes. You can add or remove water later but you want the water to just cover the potatoes.
Then, peel the potatoes, rinse to ensure they’re clean and cut them into even chunks and place in the water. (I usually cut them into 1 to 1-1/2 inch chunks.)
Add 8 to 10 peeled cloves of garlic in the water along with a generous amount of salt–approximately 1 tablespoon.

Potatoes in water in pot before being boiled.

Place the pot with the potatoes on the stove, turn the heat to HIGH, then place a stick of butter in a stainless steel bowl and set it over the potatoes.
Keep an eye on the butter and remove it from the top of the pot when it is melted or almost melted. Do not let the pot boil over. Add 1 teaspoon salt then set the butter aside to cool. You can also do this in a small saucepan to pour over the riced potatoes.

Stick of butter in stainless steel bowl.

Cook the potatoes until they can be easily pierced with a paring knife.
Drain well, then place back on the hot burner for just a couple minutes so any residual water steams away. You’ll notice the edges of the potatoes turning a little whiter.

Then, working quickly so the potatoes don’t cool too much, start pushing the potatoes and garlic while they’re still hot and steaming into the melted butter. (I find disposable gloves help tremendously in handling hot potatoes.)

Potatoes in ricer about to be riced into butter in stainless steel bowl.

Potatoes being riced into melted butter in stainless steel bowl.

Keep going until you have all the potatoes “riced.”

You still have to work quickly so the potatoes don’t cool and you end up with firm “riced” potatoes.
Quickly stir the potatoes to incorporate and distribute the butter.

Potatoes being stirred in stainless steel bowl.

Push the potatoes off to one side of the bowl.
In the other half, place the sour cream, cream cheese and half-and-half.
Puree the sour cream, cream cheese and half-and-half with an immersion blender avoiding the potatoes. Do not puree the potatoes with the immersion blender. A hand mixer also works to blend the sour cream, cream cheese and half-and-half but it takes longer. (You can also do this in a separate bowl then add it to the potatoes. However, this is how I do it at a client’s home to reduce the number of bowls and pots I use.)

Potatoes with cream cheese, sour cream and half-and-half in stainless steel bowl.

Immersion blender smoothing out cream cheese, sour cream and half-and-half.

Then stir the potatoes into the sour cream, cream cheese and half-and-half blend.
You may think you’re going to have potato soup, but it all comes together into a lovely creamy blend.

Mashed potatoes in stainless steel bowl.

Transfer the potatoes to the prepared baking dish(es). Cool and refrigerate.
When ready to bake, preheat your oven to 375 degrees and bake until the potatoes are puffy, the top is lightly golden and the potatoes are thoroughly heated through.

Unbaked mashed potatoes in oval baking dish.

Beautiful, poofy, fluffy Twice-Baked Mashed Potatoes!

Twice-Baked Mashed Potatoes in white oval baking dish.

Twice-Baked Mashed Potatoes, a mashed potato casserole, check every box: dependable, make-ahead friendly, and absolutely delicious. Once you try them this way, you’ll never go back to ordinary mashed potatoes again.

Chef Tips and Tricks:

When boiling potatoes, you always want to start with cold water. If you start with hot water or boil the water first then add the potatoes, the potatoes cook unevenly.
Over the years of my personal chef career, I’ve had to learn how to reduce the amount of pots, pans and bowls I use and reduce steps. Placing the bowl with the butter over the pot of potatoes both melts the butter and helps the pot of potatoes boil a bit faster. However, as stated above, keep an eye on the butter so it just melts and so the potatoes don’t boil over.
Leave the fresh garlic out and add some of my Garlic Confit instead!

recipe faqs:

What if I want to serve Twice-baked Mashed Potatoes right away?

Puree or blend the sour cream, cream cheese and half-and-half then place in a saucepan on the stovetop on low and very gently warm it before adding to the potatoes. Be careful to not scald the combination or boil it. Allow a little extra time to heat back up in the oven as they’ll cool down slightly.

If I want to serve these the same day, can I keep them warm in a slow cooker?

You absolutely can–up to two hours. Set your slow cooker to LOW and preheat it while boiling and assembling the potatoes. Melt a little extra butter and lightly brush the slow cooker insert. When you have the potatoes all stirred together, transfer them to your slow cooker and cover. Remove the cover occasionally to release any steam and condensation that builds up on the cover.

Why do you add melted butter to mashed potatoes? I thought you were never supposed to add melted butter to mashed potatoes because the fat and milk solids separate.

You’re after the fat in the butter here to get into the cells of the potatoes and coat the starch. A small amount of separated milk solids won’t affect the quality of the potatoes. This Twice-Baked Mashed Potatoes recipe is based on some food science put forth by Cook’s Illustrated (a membership site, so I can’t link) and food scientist Shirley Corriher, where butter goes into the potatoes before any other dairy is added. According to Cook’s Illustrated, adding melted butter first — before any liquid — coats the starch in the potatoes with fat, so it can’t absorb liquid, which is what leads to gluey mashed potatoes. Shirley Corriher says the fat from the butter is absorbed into the potatoes’ cells first, then the milk (or the rest of the dairy) loosens and flavors the potatoes. Here’s all the information at Food52, which I can link to: A Genius Trick for More Buttery-Tasting Mashed Potatoes.

Can I use an electric mixer to blend the potatoes?

You can, but I’ve never been a fan because it’s easy to over-blend the potatoes which can cause them to become gummy.

How far in advance can I make Twice-Baked Mashed Potatoes?

These can be made two to three days in advance and refrigerated. Let cool thoroughly in the refrigerator then cover. If they’re still warm when you cover them, there will be condensation that builds up on the cover which can drip back down on the potatoes.

Can I freeze Twice-Baked Mashed Potatoes?

Absolutely! After you assemble it, place it in oven-safe containers such as Pyrex or aluminum (if you’re okay with that). Cool thoroughly, then freeze for 1-2 months. Thaw in the refrigerator, then reheat uncovered in the oven at 375 degrees. They may appear a little soupy, but reheating in the oven pulls them back together.