How to Gratin Correctly in the Oven

What gratinating means

The word comes from the French "gratin": the golden crust that forms on the surface. Top heat caramelizes cheese, breadcrumbs, or egg while the interior is already cooked and only needs to heat through and melt.

Do not confuse gratinating with moderate baking: gratin is a quick finish at high temperature, usually the last few minutes of cooking.

Preparation before gratinating

Food should be nearly ready before going under the broiler. If you gratin from raw, the surface will burn before the interior cooks.

Spread grated cheese, buttered breadcrumbs, béchamel, or a mix evenly. A thin layer browns better than a thick mound that only melts without color.

• Cook almost to done before broiling.
• Thin, even layer of cheese or crumbs.
• Mix breadcrumbs with butter for extra crunch.

Temperature and oven position

Turn on the broiler or preheat the oven to 220–250 °C. Place the dish on the top rack, 10–15 cm from the heat element.

Watch constantly: gratin goes from golden to burnt in seconds. Rotate the dish if the oven heats unevenly. If the surface browns too soon and the interior is cold, lower the dish and cover with foil.

• Potato gratin: 200 °C, 15–20 min with broiler finish.
• Lasagna: broiler 3–5 minutes after baking covered.
• Vegetables with béchamel: broiler until bubbling and golden.

Tips for a perfect crust

Mix breadcrumbs with Parmesan and melted butter for a crisp crust. For stretchy cheese, use mozzarella or Gruyère; for intense flavor, Parmesan or aged cheddar.

Rest 5 minutes after removing from the oven: the sauce stops bubbling and the cut is cleaner. Serve in the same dish to keep heat and visual impact.