Roasted Garlic Mashed Potatoes

Mashed potatoes are pure comfort, and roasting the garlic first takes them somewhere special. Roasting mellows garlic into something sweet, soft and jammy, with none of the harsh bite of raw. Mashed through buttery potatoes, it makes the kind of side dish that quietly steals the meal.

The two secrets to silky mash are the right potato and warm dairy. Floury potatoes give a fluffy texture, and warming the butter and milk before they go in keeps the mash smooth, never gluey.

For more comforting sides, try my honey-roasted Brussels sprouts, or the maple roasted sweet potatoes.

Why this recipe works

Roasting garlic transforms its sharp bite into a sweet, mellow, spreadable paste that folds seamlessly into the mash. Floury potatoes give a light, fluffy texture, and adding warm butter and milk keeps everything silky. Not over-working the potatoes avoids a gluey result.

What you'll need

Simple ingredients, a little roasting:

• Potatoes: floury varieties like Maris Piper or russet mash fluffiest.
• Garlic: a whole head, roasted until soft and sweet.
• Warm dairy: warm the butter and milk so the mash stays smooth.

Smart swaps: use half cream for extra richness. Add chives, parmesan or a spoonful of sour cream. For dairy-free, use plant butter and warm plant milk. Leave the skins on for a rustic mash.

Step by step

Step 1 — Roast the garlic

Roast a whole head until the cloves are soft and golden, then squeeze them out like paste. This is what gives the mash its sweet, mellow depth.

Step 2 — Boil and drain well

Boil floury potatoes until tender and drain thoroughly — excess water makes watery mash. Let them steam-dry for a minute.

Step 3 — Mash with warm dairy

Fold in the roasted garlic with warm butter and milk. Warm dairy and a gentle hand keep the mash silky, never gluey.

Pro tips

• Use floury potatoes. They mash light and fluffy; waxy ones go gluey.
• Roast the garlic properly. Soft and golden is sweet; underdone is still sharp.
• Warm the dairy. Cold butter and milk make claggy, cool mash.
• Drain thoroughly. Watery potatoes make watery mash.
• Do not over-work. Over-mashing turns potatoes gluey.

Storage & make-ahead

Mash keeps in the fridge for up to 3 days and reheats well with a splash of warm milk to bring back the creaminess. It freezes for up to 2 months. Make-ahead tip: keep it warm in a slow cooker on low, stirring occasionally, for stress-free hosting.

Variations & substitutions

• Cheesy: fold in grated parmesan or cheddar.
• Herby: stir in chives or roasted garlic and thyme.
• Extra rich: use half cream, half milk.
• Smaller batch: use the ½x scaler.

Frequently asked questions

What potatoes are best for mash?

Floury varieties like Maris Piper, King Edward or russet give the fluffiest, silkiest mash.

Why is my mash gluey?

Usually waxy potatoes or over-mashing. Use floury potatoes and mash just until smooth.

Can I roast the garlic ahead?

Yes — roasted garlic keeps in the fridge for a few days, so you can prep it in advance.

Can I make it dairy-free?

Yes — use a good plant butter and warm plant milk for a still-creamy result.

Final thoughts: this is the mash that makes a Sunday roast or a weeknight dinner feel a little more special, all thanks to that sweet roasted garlic. Make it your own and tell me your favourite add-ins over on the contact page.

For the science of silky mashed potatoes, Serious Eats has a definitive guide.