Mashed potatoes are a must-have for any holiday meal — creamy, buttery, and the perfect canvas for gravy. But most versions are all carbs and little else.
These high-protein crockpot mashed potatoes change that.
They deliver all the creamy, buttery, comforting flavor you love — with a protein boost from blended cottage cheese, high-protein milk, and Parmesan. And they’re made in your slow cooker with almost no effort, freeing up stovetop and oven space for the rest of your meal.
Each serving packs about 9-12g of protein, making this a side dish that actually contributes to your daily protein goals. Perfect for holidays, feeding a crowd, or meal prep.
If you’ve been looking for a crockpot mashed potatoes recipe that’s both indulgent and protein-packed, this one belongs in your regular rotation.
Why These High-Protein Crockpot Mashed Potatoes Work
There’s a reason these crockpot mashed potatoes have become a go-to in my kitchen.
High-protein side dish. With blended cottage cheese, high-protein milk, and Parmesan, each serving packs 9- 12 g of protein — more than double traditional mashed potatoes.
Creamy and buttery. The combination of butter, cream cheese, and blended cottage cheese creates the silkiest, most flavorful mashed potatoes you’ll ever make.
No Greek yogurt tang. This recipe uses blended cottage cheese for protein without the tanginess that not everyone wants in mashed potatoes.
Make-ahead friendly. You can make these mashed potatoes up to 2 days ahead and keep them warm in the crockpot. Perfect for holiday meal prep.
Free up your stove. No boiling water, no draining, no stovetop babysitting — the crockpot does all the work.
Perfect for a crowd. This recipe makes 8-10 servings, with easy scaling for larger groups.
The cottage cheese is blended until completely smooth. It adds creaminess and protein without leaving behind a noticeable curdled texture.
High-Protein Crockpot Mashed Potatoes
These High-Protein Crockpot Mashed Potatoes are creamy, buttery, and rich enough for a holiday dinner, but with extra protein from blended cottage cheese, milk, and Parmesan. The potatoes cook right in the slow cooker, making this an easy make-ahead side dish for holidays, potlucks, and feeding a crowd.
Ingredients
- 5 lbs Yukon Gold potatoes, peeled and cut into 1-inch chunks
- 1 cup low-sodium chicken broth (or vegetable broth)
- ½ cup unsalted butter, cut into pieces
- 1 teaspoon kosher salt, plus more to taste
- ½ teaspoon black pepper
- 1 teaspoon garlic powder
- 1½ cups cottage cheese
- ¾ cup high-protein or ultrafiltered milk (like Fairlife), plus more as needed
- ½ cup freshly grated Parmesan cheese
- 4 oz cream cheese, softened and cubed
- Fresh chives or parsley, for garnish
Instructions
- Prepare the potatoes: Peel them and cut into evenly sized 1-inch chunks. Place the potatoes in a 6- to 8-quart slow cooker. Avoid packing the potatoes too tightly, as overcrowding can cause uneven cooking. Add the chicken or vegetable broth, butter, salt, black pepper, and garlic powder. Gently stir to distribute the seasonings and butter.
- Cook until very tender: Cover and cook on LOW for 4 to 5 hours or HIGH for 2 to 3 hours, until the potatoes are very tender and easily break apart when pressed with a fork. Cooking times can vary depending on the size of the potato pieces and the heat of your slow cooker. The potatoes should be extremely tender before mashing.
- Blend the cottage cheese: While the potatoes finish cooking, add the cottage cheese and high-protein milk to a blender or food processor. Blend until completely smooth and creamy. This step is important for creating silky mashed potatoes without a noticeable cottage cheese texture.
- Add the creamy ingredients: Blend the cottage cheese mixture and softened cream cheese, then add to the slow cooker. Allow the cream cheese to soften from the heat for 2 to 3 minutes.
- Mash the potatoes: Mash the potatoes directly in the slow cooker with a potato masher until they reach your desired texture. For smoother mashed potatoes, use a hand mixer on low speed. Avoid overmixing, as potatoes can become gummy when beaten excessively. Gradually add additional milk, 1 to 2 tablespoons at a time, if the potatoes are thicker than you prefer.
- Add the Parmesan: Stir in the Parmesan cheese until melted and evenly incorporated. Taste the mashed potatoes and adjust with additional salt, black pepper, or garlic powder as needed.
- Serve: Garnish with fresh chives or parsley and serve warm. For holiday meals or entertaining, the mashed potatoes can be kept on the WARM setting for a short period. Stir occasionally and add a small splash of milk if they begin to thicken.
Why These Mashed Potatoes Are High in Protein
Traditional mashed potatoes get most of their protein from the potatoes and milk, which typically results in a relatively modest amount per serving.
This version increases the protein by using:
- Cottage cheese as the primary protein boost (blended until smooth)
- High-protein/ultrafiltered milk for additional protein
- Parmesan cheese for extra flavor and protein
- Potatoes, which naturally contribute some protein as well
The result is a creamy, comforting mashed potato recipe with more protein than a traditional version — without relying on Greek yogurt or protein powder.
Tips for the Best High-Protein Crockpot Mashed Potatoes
- Use Yukon Gold potatoes for the creamiest texture. They have a naturally buttery flavor and mash smoothly. You can also use a combination of Yukon Gold and Russet for the best of both worlds.
- Blend the cottage cheese first. This is the key to adding extra protein without affecting the texture of the mashed potatoes. If you don’t have a blender, use an immersion blender.
- Choose a high-protein milk if available. Ultrafiltered milk can increase the protein content without requiring protein powder or Greek yogurt.
- Don’t overmix the potatoes. Overworking potatoes can release too much starch, creating a gluey texture.
- Make sure the potatoes are very tender before mashing. Undercooked potatoes will create lumps no matter how much they are mashed.
- Add extra liquid gradually. The potatoes can quickly go from thick and creamy to overly loose.
- Taste before adding more salt. Parmesan, broth, and cottage cheese can all contribute varying amounts of sodium.
- Keep them warm carefully. If holding the mashed potatoes for serving, use the WARM setting rather than continued high heat.
- Use a 6- to 8-quart slow cooker. 5 pounds of potatoes requires a large slow cooker to cook evenly.
How to Boost Protein Even Further
| Add ½ cup extra blended cottage cheese | +3-4g protein per serving |
| Use Fairlife or ultrafiltered milk | +2-3g protein per serving |
| Add ½ cup extra Parmesan | +2-3g protein per serving |
| Add 1 scoop unflavored protein powder | +5-7g protein per serving |
| Use all Yukon Gold potatoes | Naturally creamier texture |
Easy Variations
Make it with Roasted Garlic: Add 1 head of roasted garlic (squeezed out of the skins) when mashing for extra flavor.
Make it Extra Cheesy: Stir in 1 cup of shredded cheddar or additional Parmesan after mashing.
Make it Dairy-Free: Use vegan butter, dairy-free cream cheese, and oat milk instead of regular dairy. Use vegetable broth instead of chicken broth. Omit the Parmesan or use a dairy-free alternative.
Make it Herbed: Stir in 1 tablespoon of fresh rosemary, thyme, or chives after mashing.
Make it for a Crowd: This recipe scales easily—use a larger crockpot and double the ingredients to make 16 servings.
Make-Ahead, Storage, and Reheating
Refrigerate: Store leftover mashed potatoes in an airtight container in the fridge for up to 4 days.
Freeze: These mashed potatoes freeze well for up to 3 months. Thaw overnight in the fridge before reheating.
Reheat: Microwave or reheat on the stovetop over low heat, adding a splash of milk to restore creaminess. For a large batch, reheat in the crockpot on LOW for 1 to 2 hours.
Make-Ahead for Holidays: Prepare the potatoes a day ahead, refrigerate, then reheat in the crockpot on LOW for 1 to 2 hours before serving. Add a splash of milk to refresh the texture.
What to Serve With High-Protein Crockpot Mashed Potatoes
- Gravy (turkey, chicken, or beef)
- Roasted turkey or chicken
- Holiday ham
- Roasted vegetables
- Stuffing
- Cranberry sauce
Frequently Asked Questions
How much protein is in these crockpot mashed potatoes?
Each serving has about 9-12g of protein, thanks to the blended cottage cheese, high-protein milk, and Parmesan. For even more protein, add unflavored protein powder or use extra cottage cheese.
What type of potatoes are best for mashed potatoes?
Yukon Gold potatoes create the creamiest, buttery mashed potatoes. Russet potatoes create a lighter, fluffier texture. You can use either or a combination of both.
Can I taste the cottage cheese in these mashed potatoes?
No — the cottage cheese is blended until completely smooth, so it adds creaminess and protein without leaving behind a noticeable curdled texture or tangy flavor.
Can I make crockpot mashed potatoes ahead of time?
Yes — these mashed potatoes are perfect for making ahead. Cook them a day or two in advance, refrigerate, then reheat in the crockpot on LOW for 1 to 2 hours before serving. Add a splash of milk to refresh the texture.
Why are my mashed potatoes gluey?
Over-mashing can make potatoes gluey. Mash just until smooth and stop. Use a potato masher rather than a food processor or blender.
Can I use a hand mixer to mash the potatoes?
Yes — a hand mixer works well and creates very smooth potatoes. Use it on low speed and avoid over-mixing.
How long should I cook mashed potatoes in the crockpot?
Cook on LOW for 4 to 5 hours or on HIGH for 2 to 3 hours, until the potatoes are very tender and easily pierced with a fork.
What’s the best way to reheat mashed potatoes?
Reheat in the microwave or on the stovetop over low heat, adding a splash of milk to restore creaminess. For a large batch, reheat in the crockpot on LOW for 1 to 2 hours.
Can I add protein powder to mashed potatoes?
Yes — add unflavored whey or plant-based protein powder after mashing, stirring well to combine. Start with 1 scoop and add more to taste.
What slow cooker size do I need?
Use a 6- to 8-quart slow cooker for this recipe. 5 pounds of potatoes requires a large crockpot to cook evenly.
More Recipes You’ll Love
If you enjoyed these high-protein crockpot mashed potatoes, here are a few other high-protein holiday and slow cooker favorites to try:
- High-Protein Crockpot Turkey Breast (The Juiciest You’ll Ever Make) — tender, juicy turkey breast made in the crockpot — perfect for smaller holiday dinners
- High-Protein Crockpot Stuffing (Classic Holiday Side Dish) — savory, herby stuffing made in your slow cooker — frees up oven space.
- High-Protein Crockpot Green Bean Casserole (Easy & Creamy) — a classic holiday side dish made easy in the crockpot
Conclusion
These high-protein crockpot mashed potatoes are proof that the best side dishes can be both indulgent and nutritious. With blended cottage cheese, high-protein milk, and Parmesan, each serving packs 9- 12 g of protein — more than double traditional mashed potatoes.
Make them ahead, keep them warm in the crockpot, and focus on the rest of your meal. These mashed potatoes are guaranteed to be a hit at any table.
Give these high-protein crockpot mashed potatoes a try — they just might become your new go-to holiday side dish.
