Kentucky Hot Brown Casserole (Dinner Recipe)

This Kentucky-style hot brown casserole layers cooked turkey, bread, tomato, crisp bacon, and Parmesan Mornay sauce for a hearty oven-baked dinner. Make the sauce on the stovetop, assemble it in an oven-safe dish, and bake at 350°F until the center reaches 165°F. Add bacon near the end to keep its texture crisp.

A browned top can be tempting, but it does not prove the center is hot enough. For a casserole made with cooked turkey, the reliable check is a clean probe thermometer reading 165°F (74°C) at the center. That small step helps make this comfort-food dinner both satisfying and safe to serve.

I build this version around familiar ingredients and a sauce you can make in one saucepan. The recipe serves six, uses a standard 9-by-13-inch dish, and leaves room to adjust the bread, tomato, or bacon to suit your table.

Cookware and Ingredient Preparation

Choose cookware by its job: a saucepan for the cheese sauce and an oven-rated dish for baking. Prepare the filling before you start the sauce, so the turkey, bread, tomato, and bacon are ready to layer. Check the dish’s oven rating, and avoid sudden temperature changes that can damage glass or ceramic.

Ingredients

• 1 pound cooked turkey, cut into bite-size pieces
• 6 slices sturdy bread, cut into roughly 1-inch cubes
• 2 medium tomatoes, sliced and drained well
• 6 slices bacon, cooked until crisp and drained
• 4 tablespoons butter, plus a little for the baking dish
• 1/4 cup all-purpose flour
• 3 cups milk, warmed
• 1 cup finely grated Parmesan, divided
• 1/2 teaspoon salt, or to taste
• 1/4 teaspoon black pepper
• A small pinch of nutmeg, optional

Lightly butter an oven-rated 9-by-13-inch casserole dish. Let cold ingredients lose some of their chill while you work, but keep cooked turkey refrigerated until you are ready to assemble. Drain the tomatoes and pat them dry; excess liquid can make the bread and sauce watery. Cook the bacon fully, then set it aside.

Use a stainless steel or tri-ply stainless saucepan for the sauce. Tomato is acidic, so avoid leaving it in prolonged contact with bare aluminum or unlined copper. If you use an induction cooktop, the saucepan needs a magnetic base. The casserole dish itself does not need to work on induction.

If using nonstick cookware, follow the maker’s temperature limits. PTFE pans commonly have limits in the 400–500°F range, but the exact rating varies. Do not heat an empty pan, and skip aerosol cooking spray on nonstick surfaces; its residue can build up. Set glass or ceramic dishes on a dry trivet when hot, not on a cold or wet surface.

Mornay Sauce, Assembly, and Baking

Mornay is a white sauce enriched with cheese. Its base starts with a roux, a cooked blend of fat and flour that thickens liquid. In this recipe, gentle heat and gradual whisking help make a smooth sauce that coats the turkey and bread without scorching.

Make the sauce

1. Heat the oven to 350°F (177°C). Keep the rack near the middle.
2. Melt the butter in a saucepan over moderate heat. Stir in the flour and cook for about 1 to 2 minutes, whisking often. The mixture should look smooth and pale, not deeply browned.
3. Gradually whisk in the warm milk. Add a little at first and whisk until smooth, then pour in the rest in a steady stream.
4. Bring the sauce to a gentle simmer, whisking often, until it thickens enough to coat a spoon. Lower the heat if it begins to boil hard.
5. Take the pan off the heat. Stir in 3/4 cup Parmesan, the salt, pepper, and optional nutmeg. Taste and adjust the seasoning.

Butter’s smoke point varies by product, often around 300–350°F (149–177°C). That is not a target for cooking the roux. Moderate heat helps the butter and flour cook without smoking or taking on a bitter, dark taste. Keep the sauce below a hard boil to reduce the chance of scorching or separation.

Layer and bake

Scatter the bread cubes in the buttered dish. Add the turkey and drained tomato in an even layer, then pour the Mornay sauce over the top. Use a spoon to guide sauce into the gaps, but do not press the bread down into a dense layer.

Sprinkle the remaining Parmesan over the sauce. Bake for about 25–35 minutes, checking the center with a clean probe thermometer. Insert it into the thickest central part of the casserole without touching the dish. The target is 165°F (74°C). The exact time depends on the dish and how cold the ingredients were, so use temperature rather than browning as the safety test.

Add the cooked bacon during the last 5 minutes of baking, or scatter it over the casserole just before serving. This helps it stay crisp. If you want a more browned top, use the broiler only if the dish is labeled broiler-safe. Watch it continuously, and remove it as soon as the top is browned to your liking.

Kitchen Scenarios: Adjustments That Keep the Casserole Reliable

Small changes in ingredients and cookware can affect moisture and timing. These common kitchen scenarios show how to adapt without changing the core method: drain wet ingredients, use an oven-safe dish, and check the center temperature. The times below are estimates, not substitutes for checking the casserole.

A cold or wet glass or ceramic dish moved straight into a hot oven can crack from thermal stress. The same risk applies if a hot dish is set on a cold, wet surface. Use room-temperature cookware, follow the maker’s limits, and place a hot dish on a dry trivet. There is no single temperature difference that is safe for every glass or ceramic dish.

Serving and Dining Presentation

Let the casserole rest for about 5 to 10 minutes before serving. A short rest helps the sauce settle, making portions easier to lift. Serve it warm, with bacon on top so each portion gets some crisp texture and the tomato, turkey, bread, and Parmesan sauce remain easy to see.

For a simple dinner plate, pair the casserole with a green salad or a lightly cooked vegetable. The casserole already includes bread, turkey, cheese, and bacon, so a fresh or vegetable side can balance its rich sauce. If serving buffet-style, keep the food at 135°F (57°C) or above while it is being held hot.

The dish works well for a family dinner or a shared meal, but avoid leaving it out for an extended period. For leftovers, move the food into shallow containers and refrigerate promptly. Reheat portions until the center reaches 165°F (74°C).

Safe Cooling and Cookware Care

Food safety continues after baking. Check the casserole’s center with a clean thermometer, keep hot food at 135°F or above when holding it for service, and refrigerate leftovers promptly. Careful cooling and gradual cookware temperature changes also help protect both the meal and the baking dish.

Do not judge safety by a bubbling edge or browned cheese. If the center has not reached 165°F, keep baking and check again with a clean probe. When dinner is ready, serve it promptly or maintain a hot-holding temperature of at least 135°F (57°C).

Transfer leftovers to shallow containers and refrigerate them promptly. As a general food-safety rule, do not leave perishable food at room temperature for more than two hours, or more than one hour when the room is above 90°F (32°C). Reheat leftovers to 165°F at the center.

Let the casserole dish cool gradually before washing. Do not pour cold water onto hot metal or glass cookware; a sudden temperature shift can warp metal or crack glass. Once cool, soak stuck sauce with warm water and clean it with a nonabrasive sponge.

Frequently Asked Questions

These answers cover the details most likely to affect a successful turkey hot brown casserole: safe temperature, sauce texture, ingredient swaps, and storage. Follow the recipe’s temperature checks when ingredients or cookware change, since oven time can vary. The center reading is the key safety check; appearance alone is not enough.

Can I use leftover turkey?

Yes. Cut cooked turkey into bite-size pieces and keep it refrigerated until you assemble the casserole. Bake until the center reaches 165°F (74°C), even though the turkey was cooked before it went into the dish.

What temperature should the casserole reach?

The center should reach 165°F (74°C). Check with a clean probe thermometer in the thickest central area, without touching the dish.

Can I make it without bread?

Yes. Leave out the bread for a less traditional, looser bake. The casserole may have a softer texture and less structure, so serve it with a spoon.

How do I keep the casserole from getting watery?

Drain and pat the tomatoes dry, and avoid adding extra liquid to the dish. If the sauce seems thin before assembly, simmer it gently until it coats a spoon.

When should I add the bacon?

Add cooked bacon in the final 5 minutes of baking or after the casserole comes out of the oven. That timing helps preserve its crispness.

Can I make the sauce ahead?

You can prepare the sauce ahead and refrigerate it, but it will thicken as it cools. Rewarm it gently while whisking; add a small splash of milk if needed to loosen it before assembly.

Can I put a cold glass dish in the oven?

Avoid moving a cold glass dish straight into a hot oven. Let the dish come to room temperature, follow its maker’s oven-use instructions, and avoid setting a hot dish on a cold or wet surface.

How should I store and reheat leftovers?

Refrigerate leftovers promptly in shallow containers. Reheat until the center reaches 165°F (74°C), checking with a thermometer.

The Reliable Finish

For a dependable result, prepare the ingredients first, whisk the sauce over moderate heat, and bake in a dish rated for the oven. Drain the tomatoes, add bacon near the end, and use a thermometer to confirm 165°F in the center. Those simple checks bring the familiar hot brown flavors to the table without guesswork.

(This article was written by one of our staff writers, Steven R. Bancroft. Visit our Meet the Team page.)