Dinner

Cheesy Mashed Potatoes Recipe

ByIsabella Vance January 18, 2026January 18, 2026

Introduction

Cheesy mashed potatoes are a creamy, comforting side dish perfect for any meal. This recipe combines Gruyere and cheddar cheeses for a rich, flavorful twist on classic mashed potatoes that everyone will love.

A white oval bowl filled with creamy mashed potatoes that have a smooth, slightly swirled texture. The top layer is light beige with melted butter creating shiny yellow streaks. A small square of unmelted butter sits in the center, surrounded by small green chopped chives scattered evenly. The bowl rests on a white marbled surface, next to a striped cloth napkin on the left and a clear butter dish with sliced butter pieces on the right. photo taken with an iphone --ar 4:5 --v 7

Ingredients

3 pounds russet potatoes, peeled and cut into even chunks
5 tablespoons unsalted butter
1/2 cup heavy cream
1/2 cup sour cream
1 teaspoon kosher salt, plus more to taste
1 teaspoon black pepper
1 teaspoon garlic powder
1 teaspoon Dijon mustard
1 cup shredded Gruyere cheese, divided
1 cup shredded cheddar cheese, divided
Chopped fresh chives, for garnish

Instructions

Step 1: Place the potatoes into a large pot and cover them with cold water. Add salt to the water and bring it to a boil. Cook the potatoes until they are fork tender, about 15 to 18 minutes.
Step 2: Drain the potatoes thoroughly and return them to the pot. Let them sit for a minute to release some steam. Add the butter and heavy cream, and mix roughly to help the butter melt completely.
Step 3: Stir in the sour cream, kosher salt, black pepper, garlic powder, and Dijon mustard. Use a potato masher to mash the potatoes until you reach your desired smoothness.
Step 4: Fold in 3/4 cup of the Gruyere and 3/4 cup of the cheddar cheese until well combined.
Step 5: Sprinkle the remaining cheese over the top of the mashed potatoes and cover the pot. Let the residual heat melt the cheese. Before serving, garnish with chopped fresh chives.

Tips & Variations

For extra creaminess, warm the cream and butter before adding them to the potatoes.
Try swapping Gruyere with mozzarella or Parmesan for different cheese flavors.
Add roasted garlic instead of garlic powder for a deeper garlic taste.
Use Yukon Gold potatoes for a slightly sweeter and creamier texture.

Storage

Store leftover cheesy mashed potatoes in an airtight container in the refrigerator for up to 3 days. Reheat gently on the stovetop or in the microwave, adding a splash of cream or milk to restore creaminess if needed.