Sheet Pan Scalloped Potatoes Recipe - The Cookie Rookie® (2024)

FAQs

What is the one trick Michael Symon uses to make perfect scalloped potatoes? ›

Surprisingly, aluminum foil is his secret weapon. After beautifully shingling the potatoes (he's got a genius trick for doing this quickly, too) he covers the dish in foil before hitting the oven.

Starch Will Not Swell–Rock-Hard Scalloped Potatoes

Potatoes or rice can remain rock-hard after prolonged cooking. Starch will not swell if it is acidic. If you have a lot of sour cream in your scalloped potatoes or add something acidic, your potatoes may not soften.

If the potatoes aren't cooked properly, they will seem chewy and have an al dente texture. We avoid this issue by cooling the sliced potatoes in milk on the stovetop, prior to assembling and baking the scalloped potatoes.

If raw, once the potato is cut you can store in the refrigerator, covered with water for 12-24 hours. Be sure to keep submerged in water to prevent slices from turning gray or brown.

A sauce that's too thin can result in a watery dish lacking the rich, luxurious texture that scalloped potatoes are famous for. Thankfully, there's a simple and effective solution to this problem: Use instant potato flakes.

Avoid overcooking the potatoes – think of them like pasta. They should be juuuust cooked, where a sharp knife can slide in and out, and the slice remains intact. Slightly undercooking is better than overcooking since the potatoes will cook further in the casserole, so they won't remain hard.

Cover the dish with aluminum foil. Bake in the preheated oven until potatoes are fork tender, about 45 minutes. Remove foil and continue baking until cheese is bubbly and begins to brown, 10 to 15 minutes.

High heat will cause the milk to curdle. Use milk or cream with higher fat content. Whole milk, half-and-half, or cream and full-fat cheeses are necessary. Skim milk and reduced-fat products will not be your friend in this dish.

Almost always there are two reasons the potatoes turned black... exposure to air or oxygen and black spot bruising.

The difference comes down to cheese. Scalloped potato recipes are usually baked in a basic cream sauce until soft and tender, with no cheese topping. Potatoes au gratin are a bit more decadent. They are made with lots of cheese sprinkled in between the layers of potatoes and also on top of the casserole.

Why did my scalloped potatoes get watery? ›

My sauce is watery

If you stored your potatoes in water to prevent discoloring, be sure to drain them well and pat them dry before adding to your casserole. Some of the waxier potatoes can release more water than starchier ones, so look for good baking potatoes like russet or Yukon golds.

Start by slicing the potatoes into 1/8-inch-thick slices. You could use a mandoline slicer for this step, but I actually prefer to do it with a knife. Just be careful to slice the potatoes thinly and evenly so that they cook through at the same rate.

You can assemble the dish and refrigerate for about 8 hours before baking, or you can bake it and refrigerate for about 24 hours before serving. To reheat, cover with foil and warm in a 350°F oven for about 20 minutes.

Preventing watery scalloped potatoes begins during the preparation stage. First, it's essential to choose the right type of potatoes. Go for starchy varieties, such as russets, rather than waxy types, such as red potatoes. Starchy potatoes are less watery, contributing to a thicker, creamier dish.

"It pokes holes in the skin, which allows steam to escape. Otherwise, they could explode—it doesn't happen all the time, but it happens every once in a while. The potato is full of water it's trying to turn to steam, or water vapor. The skin acts like a pressure vessel.

High oven temperatures can make the milk's components break apart, again leaving the proteins free to clump together. To prevent curdling, cook your scalloped potatoes at a lower temperature and across a longer period of time.

The difference comes down to cheese. Scalloped potato recipes are usually baked in a basic cream sauce until soft and tender, with no cheese topping. Potatoes au gratin are a bit more decadent. They are made with lots of cheese sprinkled in between the layers of potatoes and also on top of the casserole.