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Roasted Garlic Creamy Mashed Potatoes

Roasted garlic, warm buttered milk, and a spoonful of sour cream turn properly handled russets into a plush, fluffy potato side.

Fluffy roasted garlic mashed potatoes in a cream bowl, topped with amber browned butter and fresh herbs.

For exceptionally smooth mashed potatoes that stay light, start with russets. Their high starch and low moisture produce airy strands through a ricer, while roasted garlic and sour cream add flavor without requiring heavy mixing.

The important restraint comes at the end: warm dairy, brief folding, and immediate serving keep the texture buttery and soft rather than gluey.

Why russets stay fluffy

Russets are the best choice when fluffy texture is the goal. Their dry, starchy flesh breaks down into delicate pieces, unlike waxy potatoes, which can remain dense; Yukon Golds are flavorful but make a more compact mash.

Start the chunks in cold water so their centers and exteriors finish together. A gentle simmer, rather than a violent boil, preserves tidy pieces that drain cleanly.

Dry, then rice while hot

After draining, return the potatoes to the warm pot for a minute or two. That small drying step removes surface water, so the finished potatoes taste rich rather than diluted.

Rice the potatoes and soft roasted garlic while they are hot. The ricer makes fine, separate strands with almost no agitation, which is the central defense against gumminess.

A potato ricer presses hot potatoes and roasted garlic into fine fluffy strands over a warm pot. — Hot potato and roasted garlic strands pass through a ricer into a warm pot.

Keep the mixing brief

Warm milk and melted butter fold into hot potatoes more readily than cold dairy, so they need less mixing. Add the sour cream with them, then stop the moment the mash is cohesive and smooth.

Avoid a food processor, blender, or prolonged electric mixing; all can overwork potato starch into a sticky texture. If the mash seems tight, fold in an extra splash of warm milk instead of beating it.

A browned-butter finish

The potatoes are complete without a garnish, but browned butter makes a compelling optional finish. Let the reserved butter turn amber and smell toasted, then add chives, parsley, or thyme off heat and spoon it over just before serving.

Amber browned butter, herbs, and roasted garlic glisten in the soft peaks of creamy mashed potatoes. — Nutty amber butter and fresh herbs settle into the soft peaks of mashed potatoes.

Roasted Garlic Creamy Mashed Potatoes

4 servings

60 minutes total

Ingredients

• 2 heads garlic
• 1 tbsp olive oil
• 2 lb russet potatoes, peeled and cut into 1 1/2-inch chunks
• 2 tsp kosher salt, divided, plus more for the cooking water
• 3/4 cup whole milk
• 10 tbsp unsalted butter, divided
• 1/3 cup full-fat sour cream
• 1/4 tsp freshly ground black pepper
• 2 tbsp chopped fresh chives, parsley, or thyme, optional

Method

Roast the garlic
Heat the oven to 400 F. Trim the tops from both garlic heads, drizzle with olive oil, wrap loosely in foil, and roast until the cloves are deeply soft and golden.
Look for: A clove squeezes from its skin with gentle pressure and smells sweet, not sharp.
Start the potatoes
While the garlic roasts, cover the potato chunks with cold water by 1 inch, salt the water well, and bring it to a steady boil over high heat.
Look for: The potatoes are submerged evenly and the water reaches an active, steady boil.
Cook until tender
Lower the heat to maintain a gentle simmer and cook the potatoes until a paring knife slides through a chunk with no resistance, but before the pieces begin to break apart.
Look for: A potato chunk feels tender all the way through and its edges remain mostly intact.
Warm the dairy
Warm the milk with 8 tbsp butter in a small saucepan over low heat just until the butter melts; keep it warm but do not let it simmer.
Look for: The butter is melted and the milk is steaming lightly without bubbling.
Dry the potatoes
Drain the potatoes thoroughly, return them to the hot empty pot, and shake over low heat for 1 to 2 minutes to drive off surface moisture.
Look for: The potato surfaces look dry and a faint starchy film coats the bottom of the pot.
Rice while hot
Squeeze the roasted garlic cloves into the potatoes, then pass the hot potatoes and garlic through a potato ricer into the warm pot; do not use a food processor or overwork with a mixer.
Look for: The potatoes fall in light, separate strands with the garlic evenly dispersed.
Fold until creamy
Fold in the warm milk-butter mixture, sour cream, 1 1/2 tsp salt, and pepper with a spatula just until smooth and creamy. Stop as soon as no dry streaks remain.
Look for: The mash is glossy and fluffy, holds a soft peak, and has no visible milk streaks.
Finish and serve
Taste and adjust salt. For an optional finish, brown the remaining 2 tbsp butter until nutty and amber, stir in the herbs, and spoon it over the potatoes just before serving.
Look for: The butter smells toasted and nutty, with golden milk solids at the bottom of the pan.