Ham and Cheese Strata Recipe: Make-Ahead Overnight Bake

Name: Ham and Cheese Strata
Prep time: 20 min
Cook time: 50 min
Total time: 1 h 20 min
Cuisine: American
Ingredients: 8 cups crusty bread (such as French or sourdough), cut into 1-inch cubes; 2 cups diced ham steak; 2 cups shredded Swiss cheese; 8 large eggs; 2 1/2 cups whole milk; 2 tablespoons Dijon mustard; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1/2 teaspoon garlic powder; 1/4 teaspoon freshly grated nutmeg; 3 green onions, sliced; 2 tablespoons unsalted butter, for greasing

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If you have never made a strata, you are missing out on one of the most practical dishes in all of home cooking. It is a savory bread pudding, assembled the night before, left to soak in the fridge, and baked the next day with almost no effort. This ham and cheese version is especially useful because it works as breakfast, brunch, or a weeknight dinner when you want something warm and filling without spending your entire evening at the stove.

The blend of diced ham, Swiss cheese, and Dijon mustard gives this real savory depth, and the nutmeg in the custard adds a warmth that you cannot quite place but would definitely miss if it were gone. Use day-old crusty bread, whether sourdough or a good French loaf, because it soaks up the egg mixture without disintegrating. The overnight rest is essential. It is what turns a pile of bread and eggs into something with a custard-like interior and a golden, slightly puffed top. This feeds a crowd easily and reheats well for lunches throughout the week. We make this most Sundays when we want a real breakfast without the morning scramble.

Layer the Bread, Ham, and Swiss Cheese

Grease a 9×13-inch baking dish with butter. Spread half the cubed crusty bread in the bottom, then layer half the diced ham steak and half the shredded Swiss cheese over it. Repeat with the remaining bread, ham, and cheese. Day-old bread works better than fresh because it absorbs the custard without turning to paste.

Pour the Custard and Refrigerate Overnight

Whisk together the eggs, whole milk, Dijon mustard, salt, pepper, garlic powder, and nutmeg until smooth. Pour the mixture evenly over the bread layers, pressing down gently so the bread absorbs the custard. Cover with plastic wrap and refrigerate for at least 4 hours, preferably overnight. The long soak is what transforms this from bread with eggs into a cohesive, custard-like casserole with a silky interior.

Bake Until Puffed and Golden in the Center

Pull the strata from the fridge and let it sit at room temperature for 20 minutes while the oven preheats to 350 degrees F. Bake uncovered for 45 to 50 minutes until it is puffed, golden on top, and set in the center. A knife inserted in the middle should come out clean. Let it rest 10 minutes before cutting, then garnish with sliced green onions. The strata actually tastes better the second day, making it a strong make-ahead choice for brunch.

Frequently Asked Questions

Can I assemble this the morning of instead of overnight?

You can, but the overnight soak is what gives the strata its custard-like interior. A minimum 4-hour rest in the fridge is the shortest version that still works.

Can I use a different cheese?

Swiss is traditional here for its nutty sharpness against the Dijon, but Gruyere or sharp cheddar both work well.

Why does the bread need to be day-old?

Day-old crusty bread absorbs the egg custard without turning to paste. Fresh, soft bread breaks down too fast and gives you a mushy strata instead of a set one.