Roasted Garlic and Bone Marrow Mashed Potatoes Tips, FAQ & printable recipe

Tips for success

To achieve the best flavor, roast your garlic heads the day before. This allows the flavors to mellow and sweeten significantly, making them easier to squeeze and blend into the potatoes.

If you find the marrow is too difficult to scrape out, gently tap the bone on the edge of the skillet to release the center. Always use fresh rosemary sprigs for roasting the bones, as the oils from the fresh herb provide a superior aroma that dried alternatives simply cannot match.

When creating the swirls in your skillet, use the back of a large spoon to create deep ridges. These ridges are essential for catching the rendered marrow and the gremolata, ensuring every bite is flavorful.

If you are serving this for a dinner party, you can prepare the mashed potatoes up to two hours in advance and keep them warm in a double boiler, only folding in the marrow and broiling the dish right before your guests are ready to eat.

Variations

• Truffle Infusion: Fold in one tablespoon of high-quality truffle oil or shaved black truffles during the final mixing phase for an earthy, aromatic twist that complements the richness of the bone marrow perfectly.
• Caramelized Onion Mash: Add half a cup of deeply caramelized onions to the potato base. The sweetness of the onions pairs beautifully with the roasted garlic and adds a complex layer of flavor to the dish.

Storage and make-ahead

Fridge

Store in an airtight container for up to 3 days.

Freezer

Freezing is not recommended as the texture of the mashed potatoes and the rendered marrow will degrade significantly upon thawing.

Reheat

Reheat in a preheated oven at 350°F (175°C) until warm, or microwave on medium power while stirring occasionally.

Store any leftovers in an airtight container in the refrigerator for up to three days. Because this dish contains dairy and animal fats, it is important to cool the leftovers to room temperature within two hours of cooking before placing them in the fridge.

Do not leave the dish out on the counter for extended periods, as the marrow can quickly lose its texture and the potatoes can become dry if not properly sealed and refrigerated.

You can boil and rice the potatoes up to 24 hours in advance. Keep the riced potatoes in a sealed container and reheat them gently with the cream and butter on the stovetop before incorporating the roasted garlic. The marrow bones should be roasted fresh for the best flavor and texture, but you can prepare the gremolata ahead of time and store it in the refrigerator until you are ready to garnish the final dish before serving.

Serving ideas

Serve this dish directly in the cast iron skillet for a rustic, impressive presentation. Place the skillet on a heat-proof trivet in the center of the table and provide large serving spoons for guests to scoop out the potatoes. The heat retention of the cast iron will keep the potatoes warm throughout the meal, which is ideal when serving alongside a main course like a thick-cut steak or a roast chicken.

Pair these potatoes with acidic or bright side dishes to balance the intense richness of the marrow. A simple arugula salad with a lemon vinaigrette or roasted asparagus with a touch of balsamic glaze works exceptionally well.

Ensure you provide extra gremolata on the side for guests who may want to add an extra hit of acidity to their portion. The goal is to highlight the creaminess of the mash while cutting through the savory fat.

Frequently asked questions

Recipe card

Roasted Garlic and Bone Marrow Mashed Potatoes

Prep 20 minCook 45 minRest 5 minTotal 1 h 10 minServes 6

Ingredients

• 800 g Yukon Gold potatoes, baked
• 2 heads roasted garlic, squeezed
• 100 ml heavy cream
• 60 g butter
• 2 whole split beef marrow bones
• 2 sprigs rosemary
• 1/4 cup parsley-caper gremolata, for serving
• 1/2 tsp flaky salt, for serving

Instructions

1. Using a potato ricer, process the baked Yukon Gold potatoes into a large mixing bowl. Add the squeezed roasted garlic, heavy cream, and butter. Whip the mixture until light and airy, ensuring all ingredients are fully incorporated into a smooth, consistent base.
2. Place the split beef marrow bones on a baking sheet, seasoning them with rosemary sprigs. Roast in a preheated oven at 450°F (232°C) for 18 minutes. The marrow should be rendered and bubbling, reaching an internal temperature of at least 145°F (63°C) for safety. Let the bones rest for at least 3 minutes before proceeding.
3. Fold the rendered liquid bone marrow into the prepared mashed potatoes until combined. Transfer the mixture into a cast iron skillet, creating swirls on the surface. Broil the skillet for 3 minutes until the potato peaks are golden and charred. Finish with parsley-caper gremolata and a sprinkle of flaky salt before serving immediately.

Contains: milk

Estimated nutrition per serving

Calories

420

Protein

8.5 g

Carbohydrates

32 g

Fat

29 g

Fiber

3 g

Sugar

2.5 g

Sodium

350 mg

Automatic estimate from the ingredient list, not laboratory-verified.