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BEST Sour Cream Onion Party Potatoes

BEST Sour Cream Onion Party Potatoes

Creamy, cheesy, and perfectly seasoned potatoes baked until golden brown. These are the ultimate crowd-pleasing side dish for any gathering.
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Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Servings: 8 servings
Course: Appetizer, Side Dish
Cuisine: American
Calories: 320
Ingredients Method Notes

Ingredients
  

Potatoes & Dairy
  • 3 lbs Yukon Gold Potatoes Peeled and thinly sliced (about 1/8 inch thick)
  • 16 oz Sour Cream Full fat recommended
  • 1 cup Sharp Cheddar Cheese Shredded
  • 1/2 cup Milk
Seasoning & Aromatics
  • 1 large Yellow Onion Finely minced
  • 4 tablespoons Butter Melted
  • 2 teaspoons Dry Onion Soup Mix Such as Lipton
  • 1 teaspoon Garlic Powder
  • 1/2 teaspoon Black Pepper
  • 1/2 teaspoon Salt Adjust to taste
  • 1/2 cup Green Onions Sliced, for garnish

Method
 

Instructions
  1. Preheat your oven to 375°F (190°C). Grease a 9x13 inch baking dish generously with butter or cooking spray.
  2. In a large mixing bowl, whisk together the sour cream, melted butter, milk, minced onion, dry onion soup mix, garlic powder, salt, and pepper until completely smooth and well combined.
  3. Gently fold in the thinly sliced potatoes until every slice is thoroughly coated in the sour cream mixture. Stir in half (1/2 cup) of the shredded cheddar cheese.
  4. Pour the potato mixture into the prepared baking dish, spreading it into an even layer. Ensure the top layer is relatively flat for even cooking.
  5. Cover the baking dish tightly with aluminum foil. Bake for 45 minutes. After 45 minutes, carefully remove the foil and sprinkle the remaining 1/2 cup of cheddar cheese over the top.
  6. Return the dish to the oven, uncovered, and bake for an additional 15 minutes, or until the top is golden brown, bubbly, and the potatoes are tender when pierced with a fork.
  7. Let the potatoes rest for 5-10 minutes before serving. Garnish generously with sliced green onions.

Notes

For best results, use starchy potatoes like Yukon Gold or Russet. Do not skip resting time, as this allows the sauce to set slightly. If the sauce appears too thick before mixing, add an extra splash of milk.