Creamy Boursin Mashed Potatoes Casserole – The Ultimate Comfort Food Side Dish
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Get ready to fall in love with the most amazing boursin mashed potatoes you’ve ever tasted! This creamy, dreamy casserole takes regular mashed potatoes and turns them into something super special. The secret? Rich and creamy Boursin cheese with garlic and herbs that makes every bite taste like it came from a fancy restaurant.
Perfect for holidays, family dinners, or any time you want to make something extra delicious, this mashed potato casserole will become your new go-to comfort food recipe. It’s so flavorful you don’t need to serve it with butter or gravy, but who would turn down homemade gravy right?
Ingredient Notes & Tips
Note: The recipe card states that this recipe serves 6. It can easily serve 8, depending on what you serve it with.
Yukon Gold Potatoes: These are the best potatoes for mashing because they’re naturally creamy and buttery. They hold their shape well and don’t get gummy like some other potatoes.
Boursin Cheese: This French cheese spread is what makes this recipe so special! The garlic and herb flavor adds amazing taste without you having to chop a bunch of ingredients. You can find it in the cheese section of most grocery stores.
Sour Cream: This makes the potatoes extra creamy and adds a little tangy flavor that goes perfectly with the rich cheese.
Parmigiano Cheese: The fresh-grated kind works best for the topping, but you can use the kind from a container if that’s what you have.
Pro Tip: Make sure all your ingredients are at room temperature before mixing – this helps everything blend together smoothly!
How to Make These Amazing Boursin Mashed Potatoes
Making this creamy mashed potato casserole is easier than you think! Here’s the simple breakdown:
First, you’ll cook your potatoes until they’re super tender. The trick is cutting them into similar-sized pieces so they cook evenly. Don’t forget to salt your water – this adds flavor right from the start!
Next comes the fun part – mashing! Do this while the potatoes are still hot so the butter and Boursin cheese melt in perfectly. Add your seasonings, sour cream, and that amazing Boursin cheese, then mix until everything is smooth and creamy.
Add potato mixture- Apply topping
The final step is transferring everything to a buttered baking dish and adding the special topping made with Parmigiano cheese and butter. This creates a golden, crispy top that’s absolutely irresistible!
Bake for about 40 minutes until the top is bubbly and golden brown. Let it cool for a few minutes before serving – this helps it set up so you can scoop out perfect portions.
Delicious Variations to Try
Bacon Lovers: Mix in some crispy bacon bits for a smoky flavor that everyone will love.
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Spicy Kick: Add a pinch of red pepper flakes or some diced jalapeños for heat.
Cheese Switch: Try different Boursin flavors like pepper or shallot and chive for new taste combinations.
Herb Garden: Top with fresh chives, parsley, or rosemary before serving.
Extra Cheesy: Mix some shredded cheddar or Gruyere right into the potato mixture.
How to Store Your Boursin Mashed Potatoes
These gourmet mashed potatoes keep really well! Store leftovers in the fridge for up to 4 days in an airtight container. To reheat, just pop them in the oven at 350°F until warmed through, or microwave individual portions.
You can even make this casserole ahead of time! Prepare everything up to the baking step, cover with plastic wrap, and refrigerate for up to 2 days. Just add the topping right before baking and you might need an extra 10-15 minutes in the oven since it’s starting cold.
Perfect Ways to Serve This Side Dish
This boursin mashed potato casserole goes with just about everything! It’s perfect alongside:
- Roasted chicken or turkey for holiday meals
- Lamb chops for weekend dinners
- Baked salmon for a fancy weeknight meal
- Ham for Easter or Christmas dinner – Coming soon!
- Any roasted vegetables for a cozy vegetarian meal
Garnish with fresh herbs like chives or parsley to make it look restaurant-pretty!
Related Recipes You’ll Love
If you like this comfort food recipe, you’ll want to try these other amazing side dishes:
- Loaded Twice-Baked Potato Casserole – Another cheesy potato favorite
- Roasted Parmesan Potatoes – Crispy outside, fluffy inside
- Creamy Au Gratin Potatoes – Classic comfort food at its best
- Oven Roasted Beets – A lighter but still indulgent side
- Cheesy Broccoli Rice Casserole – Perfect for feeding a crowd
- Classic Mashed Potatoes – Simple recipe that goes with a simple dinner or fancy holiday meal.
Ready to Make the Best Mashed Potatoes Ever?
This boursin mashed potatoes recipe is going to become your new favorite! The combination of creamy potatoes, rich cheese, and that golden crispy topping is pure comfort food magic. Whether you’re cooking for a special occasion or just want to make dinner extra special, this casserole delivers every time.
We’d love to hear from you! Try this recipe and let us know how it turned out in the comments below. Did you add any fun variations? What did your family think? Don’t forget to give this recipe 5 stars if you loved it as much as we do – it really helps other home cooks find these amazing recipes!
Creamy Boursin Mashed Potatoes Casserole
Ingredients
- 2 lbs Yukon Gold potatoes peeled and diced into 1-2-inch pieces
- ½ cup 8 tablespoons salted butter, melted, divided
- ¼ cup chicken broth
- ½ tsp salt
- ½ tsp garlic powder
- ½ tsp onion powder
- ¼ tsp ground black pepper
- ½ cup sour cream
- 5.3 oz Boursin cheese, Garlic and Fine Herbs one container
- 1-2 tbsp milk this amount may be adjusted according to the desired mashed potato texture.
Topping
- 1 cup fresh-grated Parmigiano cheese
- 4 tbsp butter softened
Instructions
- Preheat the oven to 350 °F.
- Butter a 9×9 baking dish. Set aside.
- Peeled and diced the potatoes. Rinse and place them in a saucepan.
- Fill the saucepan with water and, if desired, add 2 teaspoons of salt.
- Cook until the potatoes are tender when pierced with a fork (about 190°F internally).
- Drain the water, then add the butter and chicken broth. Mash the potatoes until the butter is melted.
- Season with salt, garlic powder, onion powder, and pepper. Mix well.
- Stir in the sour cream until combined.
- Add the Boursin cheese and mix with a spoon until fully incorporated.
- Transfer the potato mixture to the prepared baking dish and spread evenly. Set aside.
- In a small bowl, combine the Parmigiano cheese and softened butter with a fork until blended.
- Drop small pieces of the topping mixture evenly over the potatoes.
- Bake in the preheated oven for 40–45 minutes, or until the top is golden and bubbly.
- Cool the casserole for 5-8 minutes.
- Garnish with fresh herbs. Serve warm and enjoy!
Notes
- Cut the potatoes into even-sized chunks to ensure a more even cooking
- Salting the water when cooking the potatoes brings more flavor to the potatoes
- Mash the potatoes while they are still hot. This way, the butter and Boursin will blend well and give you a perfect smooth texture.
- I added sour cream for a creamy texture. The Boursin brings a nice addition of herbs and cheese flavor.
- Allow the casserole to cool for 5-8 minutes. This way, it will be easier to scoop the portions.
- You can make this casserole ahead of time. Just make sure to add the topping just before baking.
- Leftovers can be stored in an airtight container in the refrigerator for up to 4 days.
- Have fun with the recipe. Add some Parmigiano cheese into the potato mixture, choose your favorite Boursin cheese flavor, and add bacon bits or red pepper flakes for a spicy twist.
- Don’t have Parmigiano cheese? Don’t worry, substitute the topping (Parmigiano and butter) with Colby Jack or Cheddar.
Nutrition
Nutritional Disclaimer
This recipe was calculated using the exact brands and measurements I used to make this recipe. If you are following a strict diet please note changing anything will cause the nutritional info to change. My calculations are intended as a guide only.
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