Onion Roasted Mashed Potatoes

Prep: 10 min Cook: 40 min Serves: 6 Cuisine: American

Creamy mashed potatoes infused with savory onion flavor and roasted to perfection, ideal as a comforting side for family dinners or holiday gatherings.

Be the first to rate this recipe

Ingredients

  • 1 pkg. onion soup mix
  • 4 medium all-purpose potatoes
  • 1/3 cup olive oil
  • 1 3/4 cups hot milk

Instructions

  1. Preheat oven to 450°F.
  2. In a large bag, add onion soup mix, potatoes, and olive oil. Close the bag and shake until potatoes are evenly coated.
  3. Arrange the coated potatoes in a 9 x 13-inch pan and discard the bag.
  4. Bake uncovered for 40 minutes, stirring occasionally.
  5. Transfer the baked potatoes to a large bowl.
  6. Mash the potatoes and stir in hot milk until smooth and creamy.

Tips & Substitutions

For a twist, consider adding roasted garlic or shredded cheese to the mashed potatoes for extra flavor. If you're short on time, you can substitute fresh potatoes with pre-peeled and diced ones. Make sure to shake the bag well to ensure even coating of the onion soup mix and olive oil for optimal flavor absorption.

Serving Suggestions

These onion roasted mashed potatoes make a comforting side dish for a variety of meals. They pair beautifully with roasted meats, such as chicken or beef. For a complete meal, serve alongside a fresh salad like 24 Salad, or try them with your favorite vegetarian recipes for a hearty, satisfying dish.

Storage & Reheating

To store leftovers, place mashed potatoes in an airtight container in the refrigerator for up to 3 days. When reheating, add a splash of milk to restore creaminess and heat in the microwave or stovetop until warmed through. Stir well before serving to ensure an even texture.

Nutrition & Diet Analysis (per serving)

Each serving of Onion Roasted Mashed Potatoes contains roughly 331 calories, with 5g protein, 28g carbohydrates, and 23g fat. It is a good source of potassium (15% of the Daily Value), protein (10% of the Daily Value), and vitamin C (10% of the Daily Value).

331 kcal 17% DV
Protein Fat Carbs

Macronutrients

Protein 4.8g 10% DV
Total Fat 22.6g 29% DV
Carbs 27.8g 10% DV
Fiber 2.2g 8% DV
Sugar 3.7g 7% DV

Electrolytes

Sodium 263.7mg 11% DV
Potassium 694.5mg 15% DV
Cholesterol 7mg 2% DV

Vitamins & Minerals

Vitamin A 32.2mcg 4% DV
Vitamin C 8.6mg 10% DV
Vitamin D 0.9mcg 5% DV
Calcium 92.2mg 7% DV
Iron 0.6mg 3% DV
Diet fit Under 400 cal
Contains Milk

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 use other types of potatoes for this recipe?

Yes, you can use different types of potatoes such as Yukon Gold for a creamier texture or Russets for a fluffier consistency. Just keep in mind that cooking times may vary slightly depending on the type of potato used.

What if I don't have onion soup mix?

If you don't have onion soup mix, you can create your own by combining dried onion flakes, garlic powder, salt, and pepper. This will give you a similar flavor profile and can be adjusted according to your taste preferences.

Can I make this recipe ahead of time?

Absolutely! You can prepare the potatoes ahead of time and store them in the refrigerator. Just reheat them with a little extra milk before serving to achieve the desired creamy texture. This is perfect for meal prep or holiday gatherings.

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).

American recipes → Vegetarian recipes → Dairy recipes → All recipes →