Best Ever Caramelized Onion Mashed Potatoes
There is no dish that is more quintessential to American cooking than mashed potatoes. Think: creamy, cheesy, smooth potatoes often topped with chives, fresh herbs, and a whole lot of butter. My version of mashed potatoes isn’t your typical recipe – after all, they aren’t called the Best Ever Caramelized Onion Mashed Potatoes for nothing! These potatoes are loaded with herbs, topped with buttery caramelized onions, and are perfect for serving on your Thanksgiving dinner table or any festive occasion.
Why You’ll Love This Recipe
- Unique Flavor: The combination of caramelized onions and fresh herbs elevates traditional mashed potatoes to a new level.
- Perfect for Any Occasion: Whether it’s Thanksgiving dinner or a casual weeknight meal, these mashed potatoes fit right in.
- Easy to Customize: Feel free to adjust the herbs or cheese based on your personal preferences or what you have on hand.
- Creamy Texture: The use of half & half or coconut milk ensures a rich and creamy consistency without being overly heavy.
- Family-Friendly: Everyone loves mashed potatoes! This dish is sure to please both kids and adults alike.
Tools and Preparation
Before diving into the recipe, gather your tools for making the Best Ever Caramelized Onion Mashed Potatoes. Having everything ready will make the process smoother and more enjoyable.
Essential Tools and Equipment
- Skillet
- Pot
- Potato masher
- Cutting board
- Knife
Importance of Each Tool
- Skillet: Ideal for caramelizing onions evenly, allowing for that rich flavor development.
- Pot: Necessary for boiling the potatoes until they reach the perfect tenderness.
- Potato masher: Ensures a smooth and creamy texture in your mashed potatoes without lumps.

Ingredients
To create these delicious Best Ever Caramelized Onion Mashed Potatoes, you’ll need the following ingredients:
For the Caramelized Onions
- 2 Tablespoons Olive Oil
- 4 Yellow Onions (sliced thin and evenly)
For the Mashed Potatoes
- 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)
For Garnishing
- 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
To make these mashed potatoes, start by preparing the onions. Peel the skin from the onions and thinly slice them. It will look like a lot of onions, but that is okay!
Step 2: Caramelize the Onions
Once the onions are done, set them aside. Then, heat a skillet on medium heat and add in the olive oil.
* When the oil is hot, add in the onions.
* Stir them occasionally until browned and caramelized; this will take about 40-50 minutes.
Step 3: Cook the Potatoes
While the onions are cooking, prepare your potatoes:
* Wash them thoroughly.
* Chop into small pieces; peeling is optional for added texture.
Step 4: Boil the Potatoes
Next, heat a pot of water on high heat:
* Once boiling, add in your chopped potatoes.
* Cook for about 20 minutes until fork tender.
Step 5: Mash Your Potatoes
Once cooked:
1. Drain water from pot.
2. Mash the potatoes until smooth.
Step 6: Mix In Ingredients
Add in:
– The butter,
– Kosher salt,
– Half & half (or coconut milk).
Mash again until fully combined.
Step 7: Combine with Onions and Cheese
Once onions are caramelized:
1. Remove from heat and add half to your mashed potatoes along with grated parmesan cheese.
2. Stir until everything is well incorporated.
Step 8: Serve Your Mashed Potatoes
Finally:
1. Transfer mashed potatoes to a large bowl.
2. Top with remaining caramelized onions, chopped chives, thyme, sage, and melted butter.
3. Serve warm and enjoy!
How to Serve Best Ever Caramelized Onion Mashed Potatoes
These creamy mashed potatoes with caramelized onions are not only delicious but also versatile. Here are some serving suggestions to elevate your dish and impress your guests.
As a Classic Side
- With Roasted Chicken: Pair these mashed potatoes with juicy roasted chicken for a comforting meal.
- Alongside Grilled Beef: Serve with grilled beef steak for a hearty dinner that’s sure to please.
For Special Occasions
- Thanksgiving Feast: These potatoes make a perfect addition to your Thanksgiving spread, bringing warmth and flavor.
- Holiday Gatherings: Impress family and friends during holiday gatherings by presenting this unique twist on traditional mashed potatoes.
With Flavorful Toppings
- Extra Chives: Sprinkle more fresh chives on top for added color and freshness.
- Shredded Cheese: Top with extra Parmesan or your favorite cheese for a richer taste.
How to Perfect Best Ever Caramelized Onion Mashed Potatoes
Achieving the perfect mashed potatoes takes a few simple steps. Follow these tips for the best results.
- Use Yukon Gold Potatoes: Their buttery texture makes for creamier mashed potatoes.
- Don’t Rush the Onions: Take your time caramelizing the onions; it enhances their sweetness and flavor.
- Adjust Consistency: If you prefer creamier potatoes, add more half & half or coconut milk until desired consistency is reached.
- Season Gradually: Taste as you go! Adjust salt and pepper according to your preference.
- Mash While Hot: Mash the potatoes while they’re still hot for smoother results.
Best Side Dishes for Best Ever Caramelized Onion Mashed Potatoes
Pairing side dishes with your Best Ever Caramelized Onion Mashed Potatoes can create a delightful meal. Here are some great options to consider.
- Grilled Vegetables: A colorful mix of seasonal veggies adds freshness and crunch.
- Roasted Brussels Sprouts: Their slight bitterness balances the creamy richness of the potatoes.
- Garlic Green Beans: Sautéed green beans with garlic offer a nice contrast in flavors and textures.
- Herb-Crusted Salmon: The lightness of salmon complements the richness of the mashed potatoes perfectly.
- Stuffed Peppers: These can be filled with grains, beans, or vegetables for a nutritious side that’s also filling.
- Spinach Salad with Vinaigrette: A light salad will cut through the creaminess, refreshing your palate between bites.
Common Mistakes to Avoid
Making mashed potatoes may seem simple, but there are common mistakes that can affect the final result. Here are some pitfalls to watch out for:
- Using the wrong potatoes: Starchy potatoes like Yukon Gold are best for a creamy texture. Avoid waxy potatoes, which can lead to a gummy consistency.
- Not caramelizing onions long enough: Properly caramelizing onions takes time. Ensure they are browned and sweetened for the best flavor in your mashed potatoes.
- Over-mashing the potatoes: Mash just until smooth. Over-mashing can make them gluey rather than creamy.
- Skipping seasonings: Don’t forget to add salt and herbs! They enhance the flavor significantly. Taste as you go to ensure perfection.
- Not using enough liquid: The right amount of cream or milk is crucial. Too little will leave the mash dry, while too much can make it soupy.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 3 days.
- Allow mashed potatoes to cool before sealing to avoid condensation.
Freezing Best Ever Caramelized Onion Mashed Potatoes
- Place in freezer-safe containers or bags for up to 2 months.
- Label containers with the date for tracking freshness.
Reheating Best Ever Caramelized Onion Mashed Potatoes
- Oven: Preheat to 350°F (175°C) and bake covered for about 30 minutes, adding moisture if needed.
- Microwave: Heat in short intervals, stirring between, until warm throughout. Add a splash of milk if it seems dry.
- Stovetop: Warm gently over low heat, stirring continuously. Add butter or milk for creaminess.
Frequently Asked Questions
Here are some common questions about making the Best Ever Caramelized Onion Mashed Potatoes:
How do I achieve perfect caramelization?
Cook onions slowly over medium heat, stirring occasionally until they turn deep golden brown. This process takes time but enhances their sweetness.
Can I substitute non-dairy ingredients?
Absolutely! Use non-dairy butter and coconut milk or other plant-based milks for a delicious dairy-free version of these mashed potatoes.
Is this recipe suitable for meal prep?
Yes! These mashed potatoes store well and can be made ahead of time, making them perfect for busy weeknights or holiday gatherings.
How do I customize the flavors?
Feel free to experiment with different herbs or cheeses based on your taste preferences. Adding roasted garlic or different types of cheese can elevate the dish.
What should I serve with these mashed potatoes?
These creamy mashed potatoes pair wonderfully with roasted meats, stews, or as part of a festive holiday meal spread.
Final Thoughts
The Best Ever Caramelized Onion Mashed Potatoes are a delightful twist on a classic dish that everyone loves. With their rich flavors and creamy texture, they shine at any dinner table. Feel free to customize them with your favorite herbs or cheeses to make them even more special!
Best Ever Caramelized Onion Mashed Potatoes
Best Ever Caramelized Onion Mashed Potatoes are a delectable twist on a classic favorite. Creamy, buttery, and infused with the rich sweetness of caramelized onions, this dish elevates your holiday meals or weeknight dinners. Made with Yukon Gold potatoes for their perfect texture, these mashed potatoes are further enhanced with fresh herbs like chives, thyme, and sage. Whether you’re serving them alongside roasted chicken or as part of a festive Thanksgiving feast, they’re sure to impress. Easy to customize and packed full of flavor, these mashed potatoes will quickly become a family favorite.
- Prep Time: 15 minutes
- Cook Time: 70 minutes
- Total Time: 1 hour 25 minutes
- Yield: Serves approximately 6 people 1x
- Category: Side Dish
- Method: Boiling & Sautéing
- Cuisine: American
Ingredients
- 2 pounds Yukon Gold potatoes
- 4 tablespoons salted butter (or non-dairy butter)
- 3/4 cup half & half or full-fat coconut milk
- 4 yellow onions (sliced)
- Fresh herbs: chives, thyme, sage
- 2 tablespoons olive oil
- 1 teaspoon kosher salt
Instructions
- Slice onions thinly and caramelize them in a skillet with olive oil over medium heat for 40-50 minutes until golden brown.
- Wash and chop Yukon Gold potatoes into small pieces; boil them in salted water for about 20 minutes until fork-tender.
- Drain the cooked potatoes and mash them until smooth.
- Mix in butter, half & half (or coconut milk), and kosher salt; combine well.
- Stir in half of the caramelized onions and grated Parmesan cheese until blended.
- Serve warm topped with remaining caramelized onions and fresh herbs.
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 295
- Sugar: 3g
- Sodium: 450mg
- Fat: 14g
- Saturated Fat: 7g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 39g
- Fiber: 4g
- Protein: 6g
- Cholesterol: 30mg
