Onion Mashed Potatoes
Creamy mashed potatoes combined with sweet caramelized onions create a comforting side dish perfect for family dinners or holiday gatherings.
Ingredients
Instructions
- Cook the peeled and sliced potatoes until tender.
- Mash the cooked potatoes with milk and butter until smooth.
- Cook the sliced onions until soft.
- Brown the onions in butter or oil until caramelized.
- Mix the browned onions into the mashed potatoes thoroughly.
- Transfer the mixture to a casserole dish and bake uncovered at 350°F for 15 minutes.
- Brush the top of the casserole with the beaten egg yolk before baking.
- Bake until the top is golden brown.
Tips & Substitutions
For an extra depth of flavor, consider adding garlic when caramelizing the onions. If you're short on time, you can use pre-cooked or frozen mashed potatoes. Substitute sour cream for some of the milk for a tangy twist. Using Yukon Gold potatoes will give a creamier texture, while russets will yield a fluffier result. Pair with Easy Buttermilk Biscuits for a complete meal.
Serving Suggestions
These onion mashed potatoes make a perfect side dish for roasted meats or vegetarian entrees. Serve alongside grilled chicken or as a base for a hearty stew. They pair beautifully with American recipes like meatloaf or braised short ribs, adding a rich, comforting element to your meal.
Storage & Reheating
Store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place in a baking dish, cover with foil, and warm in a preheated oven at 350°F for about 20 minutes, or until heated through. You can also microwave individual portions for quick reheating.
Nutrition & Diet Analysis (per serving)
Each serving of Onion Mashed Potatoes contains roughly 1613 calories, with 35g protein, 170g carbohydrates, and 88g fat. It is an excellent source of potassium (96% of the Daily Value), vitamin C (72% of the Daily Value), and protein (69% of the Daily Value), and a good source of calcium. It also contributes 15g of dietary fiber toward your daily target.
Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.
* % Daily Values based on a 2,000 calorie diet (FDA 2020).
Frequently Asked Questions
Can I make this dish ahead of time?
Yes, you can prepare the mashed potatoes and caramelized onions in advance. Simply store them separately in the refrigerator and combine them before baking. This dish can be assembled the night before and baked just before serving for a convenient option.
What type of potatoes work best for this recipe?
Yukon Gold potatoes are ideal for their creamy texture and buttery flavor, but russet potatoes can also be used for a fluffier consistency. Avoid waxy potatoes like red potatoes, as they won't yield the same creamy result when mashed.
Can I add other ingredients to this recipe?
Absolutely! For added flavor, consider incorporating herbs like thyme or rosemary. Cheese, such as cheddar or Gruyère, can also be mixed into the potatoes for a cheesy version. Just ensure that any additions complement the caramelized onion flavor.
Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).