Kale Mashed Potatoes with Garlic and Cream

Kale mashed potatoes combine fluffy potatoes with tender chopped greens, garlic, butter, and a little sour cream for a creamy, savory side. This flexible, home-style dish pairs well with roasts, sausages, or beans, and the kale adds color and texture without making the mash complicated.

Ingredients

3 lb Yukon Gold or russet potatoes (1.36 kg), peeled and cut into roughly 1½-inch (4 cm) pieces
8 oz curly or lacinato kale (225 g), tough stems removed and leaves finely chopped
6 tbsp unsalted butter (85 g), divided
¾ cup whole milk (180 ml)
2 garlic cloves (about 6 g), finely minced or crushed
½ cup sour cream (120 g)
1 tbsp olive oil (15 ml)
2 tbsp water (30 ml), for cooking the kale
1½ tsp fine salt (about 8 g), divided, plus more for the potato water
¼ tsp freshly ground black pepper (about 0.5 g), plus more to taste

Instructions

Prepare the potatoes. Put the cut potatoes in a large pot and cover with cold water by about 1 inch (2.5 cm). Salt the water generously. Set the pot over high heat and bring it to a boil, then reduce the heat to maintain a steady simmer. Cook for 15–18 minutes, until a paring knife slides through the largest pieces easily. Starting in cold water helps the pieces cook evenly from the outside to the center.
Warm the dairy and garlic. While the potatoes cook, put the milk, garlic, and 4 tbsp (57 g) of the butter in a small saucepan. Warm over low heat for 2–3 minutes, stirring once or twice, just until the butter melts and the milk is hot but not boiling. Take it off the heat. Gentle warming softens the raw edge of the garlic and keeps the dairy from cooling the potatoes when it is added.
Cook the kale. Heat the olive oil in a wide skillet over medium heat. Add the chopped kale, water, and a pinch of the measured salt. Stir, cover, and cook for 2 minutes. Uncover and continue cooking for another 2–3 minutes, stirring often, until the leaves are tender and the water has evaporated. If the kale is still chewy, add another tablespoon of water and cook briefly until tender. Set aside.
Drain and dry the potatoes. When the potatoes are tender, drain them thoroughly in a colander. Return them to the hot pot and set the pot over low heat for about 1 minute, shaking it gently once or twice. This lets excess moisture steam away, which helps prevent watery mash. Remove the pot from the heat.
Mash until creamy. Mash the potatoes with a hand masher or pass them through a ricer back into the pot. Add the warm milk mixture in two or three additions, folding or mashing gently after each addition. Stir in the sour cream, the remaining 2 tbsp (28 g) butter, 1 tsp of the salt, and the pepper. Stop once the potatoes are smooth and fluffy; vigorous beating can make them gluey.
Fold in the greens and season. Stir the cooked kale through the potatoes until evenly distributed. Taste and add the remaining salt a little at a time, along with more pepper if you like. Serve hot, with a small extra pat of butter on top if desired.

Tips

Choose potatoes for the texture you want. Yukon Gold potatoes make a naturally buttery, creamy mash, while russets produce a lighter, fluffier result. A half-and-half mix works well if you want both qualities. Cut the pieces to a similar size so they finish cooking together.
Remove the kale stems and chop the leaves small. Thick stems stay firm even when the leaves are tender, and long ribbons can be awkward to eat in a spoonful of mash. Finely chopped leaves distribute through the potatoes more evenly. Lacinato kale works just as well as curly kale; it tends to be a little less ruffled and cooks quickly.
Keep the mash gentle. A potato masher or ricer gives you control. A food processor or blender can break down too much starch and turn the potatoes sticky. Add the warm milk gradually, since the amount needed can vary with the potato type and how dry the potatoes are after draining.
Adjust richness to suit the meal. For a lighter-tasting mash, replace some or all of the sour cream with plain whole-milk yogurt, added off the heat so it stays smooth. For a dairy-free version, use an unsweetened, unflavored plant milk and a dairy-free butter alternative; the flavor will be less rich, so taste and season carefully.

Serving Suggestions

Serve these potatoes as a warm side with roast chicken, pork chops, sausages, or a simple pan-seared piece of fish. They also make a substantial vegetarian plate beside white beans, lentils, or roasted mushrooms. If you are serving them with a saucy main, spoon some of the sauce over the potatoes so it settles into the mash and greens.

For a casual dinner, put the potatoes in a warmed serving bowl and make a shallow swirl across the top with the back of a spoon. A little melted butter, black pepper, or finely sliced chives makes a simple finish. If the rest of the meal is salty or strongly seasoned, keep the final seasoning modest and let guests add more at the table.

Variations

Make it extra garlicky: Use 3 or 4 cloves instead of 2, keeping the same gentle warming method. For a sweeter, milder garlic flavor, use roasted garlic in place of the minced cloves and mash it into the potatoes with the sour cream.

Add cheese: Fold in ½ cup (50 g) finely grated sharp cheddar or Parmesan after the potatoes are mashed. The cheese adds salt and richness, so taste before adding the full amount of salt. A little grated cheese on top is also a good option if you want the flavor without making the whole batch heavier.

Use another leafy green: Finely chopped Swiss chard or spinach can stand in for kale. Chard may need a few extra minutes to soften, while spinach wilts very quickly; cook it just until tender and drain or press away excess liquid before folding it into the potatoes. The flavor will be milder than kale.

Make a rustic mash: Leave the potato skins on if you are using thin-skinned Yukon Golds, scrubbing them well first. The result will be less smooth, with a slightly earthy flavor. Chop the kale finely so its texture still blends comfortably with the potatoes.

Storage and Reheating

Transfer leftovers to a shallow, covered container and refrigerate within 2 hours of cooking. They keep for 3–4 days in the refrigerator. The mash firms up as it chills, and the kale may darken slightly; both are normal changes. For longer storage, freeze portions in airtight containers for up to 2 months for best texture. Thaw frozen portions overnight in the refrigerator before reheating.

Reheat a portion in a covered saucepan over low heat, stirring occasionally and adding a splash of milk or water to loosen it. You can also microwave it in a covered, microwave-safe bowl, stirring every 30 seconds or so for even heating. Reheat leftovers to 165°F (74°C), as measured with a food thermometer. Avoid heating the whole batch repeatedly; warm only what you plan to serve, since repeated cooling and reheating can make the potatoes less pleasant in texture.

Frequently Asked Questions

Can I make kale mashed potatoes ahead of time?

Yes. Make the recipe, cool it promptly, and refrigerate it in a covered container for up to 3–4 days. Reheat it gently with a little milk or water and stir until creamy again. For the freshest color and texture, you can also cook the kale and potatoes separately a day ahead, refrigerate them, and combine them while reheating.

Why did my mashed potatoes turn gluey?

Potatoes can become gluey when they are worked too hard, especially in a blender, food processor, or electric mixer. Excess water left in the potatoes can also make it harder to get a good texture. Drain them well, let them steam dry briefly in the hot pot, and mash with a hand masher or ricer. Mix in the warm liquid only until the potatoes come together.

Can I use frozen kale?

Yes. Thaw frozen kale and squeeze out as much liquid as possible before adding it to the skillet. Cook it briefly with the olive oil until hot and no longer watery, then fold it into the mash. Frozen kale is usually softer and more compact than fresh, so start with about 6 oz (170 g) and add more if you want a greener, more pronounced kale flavor.

Do I have to peel the potatoes?

No. Leaving the skins on is fine, particularly with thin-skinned Yukon Gold potatoes. Scrub them thoroughly, remove any blemishes, and cut them into even pieces. The finished mash will be more rustic and less smooth than peeled-potato mash, but the skins add a pleasant texture. Russet skins are thicker, so peeling those is usually preferable.

How do I keep the potatoes warm before serving?

For a short wait, keep the pot covered over the lowest possible heat and stir occasionally, or set it over a pan of barely simmering water. Add a splash of warm milk if the surface starts to dry. Do not leave cooked potatoes at room temperature for more than 2 hours; refrigerate them promptly if dinner is delayed, then reheat safely before serving.

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