Recipe for 5 Pounds of Mashed Potatoes: Large Batch Creamy Side for Holiday Feasts

This large batch recipe delivers creamy, dreamy mashed potatoes perfect for holiday gatherings and family feasts.

With 5 pounds of potatoes, you’ll have enough to feed a crowd without sacrificing that rich, velvety texture we all love.

Ingredients for Recipe for 5 Pounds of Mashed Potatoes

Twelve ingredients transform five pounds of potatoes into that ultra-creamy crowd-pleaser everyone expects at the table.

The potatoes are everything here. Russets give you that light, fluffy texture—Yukon Golds work too but they’re waxier. Grab them from Costco or any bulk store for the best deal on five pounds. For the dairy, whole milk and heavy cream are non-negotiable for richness. Skim milk just won’t cut it (trust me, I’ve tried). The butter should be unsalted so you control the seasoning.

No heavy cream? Whole milk plus extra butter gets you close. Dairy-free? Oat milk plus vegan butter works in a pinch (though the texture won’t be quite as luscious). The garlic can be roasted first in olive oil for a deeper flavor. Skip the Parmesan if you’re keeping it strictly vegetarian, or use nutritional yeast for a cheesy kick without the dairy.

Make these ahead—reheat in a slow cooker with a splash of milk to keep them creamy. Leftovers (if there are any) stay good for 4-5 days in the fridge or freeze for 3 months. Pro tip: under-season slightly at first, then adjust before serving (the flavors meld as they sit).

Step-by-Step Instructions for 5 Pounds of Mashed Potatoes

Here’s the method I use for perfectly creamy potatoes that will steal the show at your next gathering.

Step 1: Boil the Russet Potatoes with Aromatics

Place the 5 lb Russet Potatoes in a large pot and cover with cold water by 2 inches. I always add the 6 cloves Garlic Cloves and 2 whole Bay Leaves to the water for subtle depth of flavor. Bring to a boil over high heat, then reduce to medium.

Cook for 15-20 minutes until the potatoes are fork-tender—a knife should slide in effortlessly with no resistance. Don’t let them get mushy in the water. Drain immediately and return the potatoes to the dry pot. The residual heat will evaporate any excess moisture, which is crucial for fluffy results.

Step 2: Warm the Dairy and Infuse Flavors

While the potatoes cook, warm the 1.5 cups Whole Milk and 0.5 cup Heavy Cream in a small saucepan over low heat until just steaming—don’t let it boil. I add the 1.5 tsp Kosher Salt to the warm milk to help it dissolve completely and season evenly.

In a separate small bowl, combine the 1 cup Unsalted Butter (softened) with the 0.5 cup Sour Cream. This pre-mixing ensures the cold sour cream won’t cause the butter to seize up when it meets the hot potatoes. The mixture should be smooth and slightly glossy.

Step 3: Mash and Incorporate the Liquids

Working quickly while the potatoes are hot, mash them with a potato masher or ricer until mostly smooth with a few rustic lumps remaining—I like that homemade texture. Pour the warm milk mixture over the potatoes in 3 additions, mashing gently after each addition until fully absorbed.

Add the butter-sour cream mixture and fold it in with a spatula. The key here is to work fast but gently—overworking makes mashed potatoes gummy. Taste and adjust seasoning with the 1 tsp Freshly Ground Black Pepper. The potatoes should be creamy but still hold their shape.

Step 4: Finish and Garnish for Serving

For an extra layer of flavor, I stir in the 0.5 cup Parmesan Cheese (if using) until just melted. This adds a subtle nutty depth that complements the creaminess. Transfer the mashed potatoes to a serving bowl and create a well in the center.

Drizzle with the 2 tbsp Extra-Virgin Olive Oil and sprinkle with the 0.25 cup Fresh Chives just before serving. This final touch adds freshness and a pop of color. Serve immediately while hot—they’ll thicken as they cool, so keep them covered until ready to enjoy.

Troubleshooting Great recipe for 5 pounds of mashed potatoes

🥘 Too Dry or Tough?

Overworking the potatoes or using too little liquid can leave them dry and dense. This often happens when they’re mashed vigorously after cooling.

Quick Fix: Stir in warm milk, butter, or chicken broth a little at a time until creamy. Avoid overmixing to prevent gluey texture.

🍳 Lumpy Texture?

Lumps usually mean the potatoes weren’t cooked long enough or weren’t mashed thoroughly. Uneven cutting can also cause some pieces to cook faster than others.

Quick Fix: Return lumpy batches to low heat with a splash of liquid, then mash again. For next time, cut potatoes uniformly and boil until fork-tender.

⏰ Too Thin or Watery?

Adding too much liquid or using starchy potatoes (like russets) without proper draining can make mashed potatoes runny. Overcooking can also break them down excessively.

Quick Fix: Cook off excess moisture on low heat while stirring. Thicken with instant mashed potato flakes or a bit of cornstarch slurry if needed.

🌡️ Bland or Lacking Flavor?

Under-seasoning is a common issue, especially in large batches. Salt added only at the end may not distribute evenly, and low-fat dairy can dilute flavor.

Quick Fix: Season in layers—add salt to the boiling water and adjust with butter, salt, and pepper at the end. Stir in roasted garlic or herb butter for extra depth.