Instant Pot Mashed Potatoes with roasted garlic and Parmesan are an easy, flavorful way to make a classic side. No need to wait for a pot to boil—the pressure cooker does the work. The result is creamy, cheesy, and savory mashed potatoes everyone will love.
about this instant pot mashed potatoes recipe
Mashed potatoes are essential for a holiday meal or any comforting dinner, but boiling large batches on the stovetop can be time-consuming and tie up burners. Using an Instant Pot speeds things up and frees your stove for other dishes. Potatoes pressure-cook in minutes, leaving you more time to roast, baste, or finish the rest of your menu.
This version adds roasted garlic and freshly grated Parmesan for a richer, more complex flavor than basic mashed potatoes. You’ll get the creamy texture you want plus a savory depth from the roasted garlic and the salty nuttiness from the Parmesan. The recipe is adaptable — fold in crisp bacon, fresh herbs like thyme or rosemary, or extra cheddar for a different twist.
The Instant Pot reduces active cooking time: eight minutes of high-pressure cooking for the potatoes, then mash and season. The technique is straightforward and ideal for serving a crowd.
This Recipe’s Must-Haves
Equipment-wise, an electric pressure cooker (Instant Pot or similar) is required. You’ll also want a spider strainer or colander to drain the potatoes, and a potato masher (or ricer if you prefer ultra-smooth results). A good knife and cutting board help when prepping potatoes and trimming the roasted garlic.
The main flavor elements are roasted garlic and Parmesan. Roasting mellows garlic and brings out a sweet, caramelized note that blends beautifully into mashed potatoes. Parmesan adds savory complexity and a creamy mouthfeel when stirred in while the potatoes are hot.
How To Make Instant Pot Mashed Potatoes
Roast Garlic
Roast one head of garlic at 400°F until soft and fragrant. Trim the top to expose the cloves, drizzle with a little olive oil, wrap the bulb in foil (leaving the top exposed), and bake 30–40 minutes. When cool enough to handle, squeeze the softened cloves from their skins and chop or mash them before adding to the potatoes.
Pressure Cook Potatoes
Peel and slice 3 pounds of russet potatoes into 1/2–1 inch rounds for even cooking. Place the potatoes in the Instant Pot, add about 4 cups of water and 1 teaspoon of kosher salt, then seal the lid. Cook on high pressure for 8 minutes, then quick-release the pressure.
Mash
Drain the potatoes and return them to the Instant Pot insert. Mash to your preferred texture — leave a few small lumps for a rustic bite or mash until completely smooth.
Season
Stir in the roasted garlic, 1/3 cup half-and-half (or heavy cream for extra richness), 1/4 cup unsalted butter, 3 tablespoons grated Parmesan, and additional salt and pepper to taste. Mix until everything is melted and combined. Garnish with chopped parsley or chives for color and freshness. Serve warm, with gravy if desired.
what to serve with instant pot garlic mashed potatoes
These mashed potatoes pair well with roasted or grilled proteins such as chicken, steak, smoked turkey, or salmon. They also make a comforting base for beef bourguignon or a rich gravy-topped roast. The garlic-Parmesan profile complements many savory mains.
how to store
Let leftovers cool to room temperature, then store in an airtight container in the refrigerator for up to 4 days. Reheat gently on the stove or in the microwave, adding a splash of milk or cream to restore creaminess. Leftover mashed potatoes can also be transformed into fritters or used as a filling for stuffed dishes.
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instant pot mashed potatoes with roasted garlic and parmesan
equipment
- Electric pressure cooker (Instant Pot or similar)
- Spider strainer or colander
- Potato masher or ricer
- Knife and cutting board
ingredients
- 1 head garlic
- 1 tsp olive oil
- 3 pounds russet potatoes, peeled and sliced into 1/2–1-inch rounds
- 4 cups water
- 2 tsp kosher salt (divided)
- 1/2 tsp black pepper
- 1/3 cup half-and-half (or heavy cream)
- 1/4 cup unsalted butter
- 3 Tbsp grated Parmesan
- 4 cloves roasted garlic, finely chopped
- Garnish: freshly chopped parsley
instructions
- Preheat oven to 400°F. Trim the top of a garlic head, drizzle with 1/2 tsp olive oil, wrap in foil leaving the top exposed, and bake 30–40 minutes until soft. When cool, squeeze out the cloves and finely chop or mash them.
- Place sliced potatoes in the bottom of the Instant Pot. Cover with 4 cups water and stir in 1 teaspoon of salt.
- Seal the lid and set the valve to “seal.” Cook on High pressure for 8 minutes. Quick-release the pressure when the timer finishes.
- Drain the potatoes and return them to the Instant Pot insert. Mash to your desired consistency.
- Stir in remaining salt, pepper, half-and-half, butter, Parmesan, and the roasted garlic. Adjust seasoning to taste.
- Serve warm with a garnish of chopped parsley and, if desired, gravy.