Hector Sanchez
Hands-on Time:
45 Mins
Total Time:
1 Hour 45 Mins
Yield:
Makes 10 to 12 servings

If some of your family prefer golden potatoes and others are pure sweet potato fans, this dish will help you please the entire crowd. This casserole combines Yukon gold potatoes and sweet potatoes, hence the name, into one creamy and cheesy casserole. It brings together two potatoes and flavors for a casserole that is twice as appetizing. 

How to Make It

Step 1

Preheat oven to 375°. Sauté shallots in 3 Tbsp. melted butter in a saucepan over medium heat 2 minutes. Stir in cream and next 5 ingredients; cook 2 minutes. Remove from heat; cool 15 minutes.

Step 2

Meanwhile, peel and thinly slice all potatoes. Combine sliced potatoes and milk in a large, microwave-safe bowl. Cover with plastic wrap, and microwave at HIGH 5 minutes. Uncover and gently stir mixture. Re-cover and microwave 5 more minutes. Drain mixture, discarding milk.

Step 3

Layer one-third of Yukon gold potatoes in a well-greased (with butter) 9- x 13-inch baking dish; top with one-third of sweet potatoes. Spoon one-third of cream mixture over potatoes, and sprinkle with 1/2 cup Gruyère cheese. Repeat layers twice, and top with Parmesan cheese. Cut remaining 1 Tbsp. butter into small pieces, and dot over top. Cover with foil.

Step 4

Bake at 375° for 30 minutes. Uncover; bake 20 minutes or until browned. Let stand 10 minutes.