Best Ever Caramelized Onion Mashed Potatoes
There’s no doubt that mashed potatoes are a classic favorite. This dish elevates the standard recipe with the Best Ever Caramelized Onion Mashed Potatoes. The creamy texture, combined with rich caramelized onions, makes these potatoes perfect for any gathering, from casual dinners to festive holidays. They’re not only delicious but also versatile enough to complement any main dish.
Why You’ll Love This Recipe
- Irresistible Flavor: The sweetness of caramelized onions enhances the creamy potatoes, creating a delightful taste that will impress everyone.
- Perfect for Any Occasion: Whether it’s a holiday feast or a weeknight dinner, these mashed potatoes are a crowd-pleaser.
- Easy to Make: With simple ingredients and straightforward steps, you can whip up this dish without any hassle.
- Customizable: Feel free to substitute dairy or herbs based on your preference, making it suitable for various diets.
- Comfort Food Classic: This recipe takes traditional mashed potatoes to the next level while retaining that cozy comfort food vibe.
Tools and Preparation
Before diving into the recipe, gather your tools and equipment. Having everything ready will streamline your cooking process.
Essential Tools and Equipment
- Large pot
- Skillet
- Potato masher
- Cutting board
- Knife
Importance of Each Tool
- Large pot: Ideal for boiling potatoes evenly and efficiently.
- Skillet: Perfect for caramelizing onions to achieve that sweet flavor.
- Potato masher: Ensures smooth and creamy mashed potatoes without lumps.

Ingredients
To make the Best Ever Caramelized Onion Mashed Potatoes, you will need the following ingredients:
- 2 Tablespoons Olive Oil
- 4 Yellow Onions (sliced thin and evenly)
- 2 Pounds Yukon Gold Potatoes (washed)
- 4 Tablespoons Salted Butter (you can use non-dairy butter, if preferred)
- 3/4 Cup Half & Half or Full-Fat Coconut Milk or Dairy-Free Milk
- 1 Teaspoon Kosher Salt
- 1 Cup Parmesan Cheese (freshly grated)
- 1 Bunch Chives (thinly chopped)
- 2 Sprigs Fresh Thyme (stems removed)
- 3 Leaves Fresh Sage (chopped)
How to Make Best Ever Caramelized Onion Mashed Potatoes
Step 1: Prepare the Onions
Start by peeling and slicing the onions thinly. Though it might seem like a lot of onions, they will cook down significantly.
Step 2: Caramelize the Onions
- Heat a skillet over medium heat and add the olive oil.
- Once hot, add in the sliced onions.
- Stir occasionally for about 40–50 minutes until they become browned and caramelized.
Step 3: Cook the Potatoes
While the onions are caramelizing:
* Wash and chop the Yukon Gold potatoes into small pieces. Leaving the skins on adds texture.
* In a large pot, bring water to a rolling boil.
* Add in the chopped potatoes and cook for about 20 minutes until fork-tender.
Step 4: Mash the Potatoes
Once cooked:
1. Drain the water from the pot.
2. Use a potato masher to mash them until smooth.
Step 5: Combine Ingredients
Add in:
– The butter,
– Kosher salt,
– Half & half (or coconut milk).
Mash again until everything is well combined.
Step 6: Incorporate Caramelized Onions
Remove half of the caramelized onions from the skillet and mix them into the mashed potatoes along with freshly grated parmesan cheese.
Step 7: Serve with Toppings
Transfer the mashed potatoes to a serving bowl. Top with remaining caramelized onions, chopped chives, thyme, sage, and melted butter. Enjoy!
How to Serve Best Ever Caramelized Onion Mashed Potatoes
These creamy and flavorful mashed potatoes are a delightful addition to any meal. They pair beautifully with a variety of dishes, making them a versatile side.
With Grilled Chicken
- Juicy grilled chicken breasts complement the rich flavors of the mashed potatoes, creating a balanced plate.
Alongside Beef Stew
- The hearty nature of beef stew pairs perfectly with the creamy texture of the mashed potatoes, making for a comforting meal.
Topped with Fresh Herbs
- Garnish your mashed potatoes with extra chopped chives, thyme, or sage for an aromatic touch that enhances the dish.
As a Base for Meatballs
- Serve your mashed potatoes as a base for savory meatballs. The flavors meld wonderfully, creating a satisfying dish.
With Roasted Vegetables
- Pair these mashed potatoes with a colorful medley of roasted vegetables for a nutritious and vibrant meal.
In a Casserole
- Use the mashed potatoes as a topping in a casserole for added creaminess. This can be layered with vegetables or meats for a delicious one-dish meal.
How to Perfect Best Ever Caramelized Onion Mashed Potatoes
To ensure your mashed potatoes turn out perfectly creamy and flavorful, consider these helpful tips:
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Use Yukon Gold Potatoes: These potatoes have a natural buttery flavor and creamy texture that is ideal for mashing.
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Don’t Rush the Onions: Take your time caramelizing the onions; this step adds depth and sweetness to the dish.
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Add Warm Ingredients: Using warm butter and milk helps to keep the texture smooth when mixing into the potatoes.
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Mash Gently: Avoid over-mashing to prevent gummy potatoes. Aim for creamy without being too processed.
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Incorporate Fresh Herbs: Adding fresh herbs like thyme and sage enhances flavor and freshness in every bite.
Best Side Dishes for Best Ever Caramelized Onion Mashed Potatoes
These mashed potatoes can elevate any meal. Pair them with these delicious side dishes for an unforgettable dining experience:
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Grilled Asparagus: Lightly seasoned asparagus adds crunch and freshness to balance the creaminess of the mashed potatoes.
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Roasted Brussels Sprouts: Crispy Brussels sprouts provide a savory contrast that complements the richness of the dish.
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Steamed Broccoli: Bright green broccoli adds color and nutrients while offering a mild flavor that pairs well with mashed potatoes.
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Honey Glazed Carrots: Sweet carrots bring a pop of sweetness, enhancing the overall taste profile of your meal.
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Garlic Green Beans: Sautéed green beans with garlic lend an aromatic touch that meshes beautifully with your mashed potatoes.
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Cauliflower Gratin: A cheesy cauliflower gratin offers another layer of comfort food that pairs delightfully with your dish.
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Crispy Potato Wedges: For an extra potato fix, serve crispy wedges seasoned simply with salt and pepper alongside your mash.
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Side Salad: A fresh garden salad provides lightness to balance out the richness of the Best Ever Caramelized Onion Mashed Potatoes.
Common Mistakes to Avoid
Creating the Best Ever Caramelized Onion Mashed Potatoes can be a delightful experience, but there are common mistakes that can hinder your results.
- Overcooking the Onions: If you cook the onions too quickly on high heat, they may burn instead of caramelizing. Always use medium heat and stir occasionally for even browning.
- Not Using Enough Salt: Salt enhances flavor and helps balance the richness of the potatoes. Don’t skip this step; adding salt at different stages can elevate your dish.
- Skipping the Skin on Potatoes: Leaving the skin on Yukon Gold potatoes adds texture and nutrients. If you peel them, your mashed potatoes may lack depth and flavor.
- Mashing Too Aggressively: Over-mashing can lead to gummy potatoes. Use a gentle hand or a potato ricer for smoothness without excess starch release.
- Ignoring Temperature of Ingredients: Cold butter or milk can cool down your mash. Ensure they are at room temperature before mixing for creamy results.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 3 days.
- Allow the mashed potatoes to cool completely before sealing.
Freezing Best Ever Caramelized Onion Mashed Potatoes
- Freeze in a freezer-safe container for up to 2 months.
- Portion into smaller containers for easier thawing and reheating.
Reheating Best Ever Caramelized Onion Mashed Potatoes
- Oven: Preheat oven to 350°F (175°C), cover with foil, and bake for 20-25 minutes until heated through.
- Microwave: Heat in a microwave-safe bowl, stirring every minute, until hot. Add a splash of milk if they seem dry.
- Stovetop: Warm over low heat in a saucepan, stirring frequently. Add butter or cream as needed for creaminess.
Frequently Asked Questions
Here are some common questions about making the Best Ever Caramelized Onion Mashed Potatoes.
Can I use other types of potatoes?
Yes! While Yukon Gold is recommended for its creamy texture, you can substitute with red or russet potatoes if desired.
What can I use instead of Parmesan cheese?
For a non-dairy option, consider using nutritional yeast or a plant-based cheese alternative that melts well.
How do I achieve perfectly caramelized onions?
Cook them slowly over medium heat while stirring occasionally. Patience is key; it usually takes about 40-50 minutes.
Is this recipe gluten-free?
Yes! All ingredients used in this recipe are gluten-free, making it suitable for those with gluten sensitivities.
Final Thoughts
The Best Ever Caramelized Onion Mashed Potatoes are not just a side dish; they are a celebration of flavors and textures that will impress anyone at your dinner table. Feel free to customize this recipe by adding roasted garlic or different herbs to suit your taste. Enjoy these creamy delights at any gathering!
Best Ever Caramelized Onion Mashed Potatoes
Indulge in the creamy, rich flavors of Best Ever Caramelized Onion Mashed Potatoes—an elevated twist on a classic favorite. This dish combines buttery Yukon Gold potatoes with sweet, caramelized onions to create a comforting side that’s perfect for any occasion, whether it’s a casual dinner or a festive gathering. With just the right touch of herbs and cheese, each bite is a savory delight that pairs beautifully with grilled chicken, beef stew, or roasted vegetables. Easy to prepare and customizable to your taste, this recipe promises to impress your family and friends while delivering warmth and satisfaction.
- Prep Time: 15 minutes
- Cook Time: 70 minutes
- Total Time: 1 hour 25 minutes
- Yield: Serves approximately 6
- Category: Side
- Method: Boiling and Mixing
- Cuisine: American
Ingredients
- 2 tablespoons olive oil
- 4 yellow onions (thinly sliced)
- 2 pounds Yukon Gold potatoes (washed and chopped)
- 4 tablespoons salted butter (or non-dairy butter)
- 3/4 cup half & half or full-fat coconut milk
- 1 teaspoon kosher salt
- 1 cup grated Parmesan cheese (or plant-based alternative)
- Fresh herbs: chives, thyme, sage
Instructions
- Heat olive oil in a skillet over medium heat. Add sliced onions and cook for 40–50 minutes until caramelized.
- In a large pot, bring water to a boil. Add chopped potatoes and cook for about 20 minutes until fork-tender.
- Drain potatoes and mash until smooth. Mix in butter, kosher salt, and half & half or coconut milk.
- Stir in half of the caramelized onions and grated Parmesan cheese until well combined.
- Transfer to a serving bowl and top with remaining onions and fresh herbs before serving.
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 330
- Sugar: 3g
- Sodium: 680mg
- Fat: 14g
- Saturated Fat: 7g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 49g
- Fiber: 5g
- Protein: 6g
- Cholesterol: 30mg
