English Breakfast Casserole with Sausage and Hash Browns

English breakfast casserole turns familiar full-English ingredients—sausage, bacon, mushrooms, tomatoes, beans, eggs, and toast—into an oven-baked brunch dish. This version layers browned sausage and vegetables with bread and a seasoned egg mixture, then bakes until set; it is inspired by the British cooked breakfast, though ingredients and serving styles vary by household.

Ingredients

1 tablespoon (15 ml) neutral oil, plus more for the dish
1 pound (450 g) bulk breakfast sausage, preferably plain pork sausage
6 ounces (170 g) bacon, cut into ½-inch (1 cm) pieces
8 ounces (225 g) cremini or button mushrooms, sliced
1 medium yellow onion, about 7 ounces (200 g), diced
1 medium tomato, about 5 ounces (140 g), seeded and diced
1 cup (240 g) canned baked beans, drained of excess sauce
6 slices (about 6 ounces/170 g) sturdy white or whole-wheat bread, cut into 1-inch (2.5 cm) cubes
8 large eggs
1½ cups (360 ml) whole milk
1 teaspoon (5 g) dry mustard powder
½ teaspoon (1 g) fine salt, plus more to taste
¼ teaspoon black pepper
½ cup (55 g) shredded sharp cheddar
2 tablespoons (8 g) chopped fresh parsley, optional

Instructions

Heat the oven to 350°F (175°C). Lightly grease a 9-by-13-inch (23-by-33-cm) baking dish. Set out the bread cubes; day-old bread works well, but fresh bread is fine.
Heat the oil in a large skillet over medium heat. Add the sausage and bacon. Cook for 8–10 minutes, breaking the sausage into small pieces, until browned and cooked through. Check the thickest sausage pieces with a food thermometer: ground meat, including sausage, must reach the USDA FSIS safe minimum temperature of 160°F (71°C). Transfer the meat to a plate with a slotted spoon, leaving about 1 tablespoon of drippings in the pan. Drain excess fat safely; do not pour it down the sink.
Add the mushrooms and onion to the skillet. Cook for 6–8 minutes, stirring occasionally, until the mushrooms release their liquid and the onion softens. Stir in the tomato and cook for 2 minutes. Remove the pan from the heat, then fold in the baked beans and cooked meat.
Spread the bread evenly in the prepared dish. Spoon the meat and vegetable mixture over it, distributing the ingredients to the corners. Sprinkle the cheddar over the top.
In a large bowl, whisk the eggs, milk, mustard powder, salt, and pepper until evenly combined. Pour the mixture slowly over the casserole, pausing briefly so the bread can absorb some of it. Press down gently with a spatula to moisten exposed bread without compacting the layers.
Bake uncovered for 40–50 minutes, until the center is set and the top is golden. Check the center with a food thermometer; egg dishes must reach the USDA FSIS safe minimum of 160°F (71°C). If the top browns before the center reaches that temperature, loosely cover the dish with foil and continue baking. Rest for 10 minutes before cutting, then finish with parsley if using.

Tips

Use plain sausage if possible, then adjust salt after cooking. Strongly seasoned sausage can make the casserole too salty, especially with bacon and baked beans.
Drain excess grease from the skillet before cooking the vegetables. Leaving a little adds flavor; too much can make the bread and egg layer oily.
For a crispier top, use slightly stale bread and bake uncovered. Very fresh, soft bread absorbs more egg mixture and produces a softer, more pudding-like texture.
For an easier morning, cook the sausage, bacon, and vegetables ahead and refrigerate them promptly. Assemble with the eggs and bread shortly before baking rather than leaving raw egg mixture at room temperature.

Serving Suggestions

Serve warm in generous squares, with extra baked beans, grilled tomatoes, or sautéed mushrooms on the side. A simple green salad or fresh fruit provides a lighter contrast, while toast is unnecessary unless you want a traditional breakfast spread. Offer ketchup, brown sauce, or hot sauce at the table so everyone can season their portion.

This casserole is filling enough for brunch or an informal supper. For a larger breakfast, serve it alongside tea or coffee and a bowl of fruit. Let the casserole rest for 10 minutes before slicing; that short pause helps portions hold together without cooling the dish too much.

Variations

For a vegetarian version, omit the sausage and bacon and use an extra 8 ounces (225 g) of mushrooms, plus 1 tablespoon (15 ml) oil for sautéing. A vegetarian sausage substitute also works; cook it according to its package directions and check that it is hot throughout. The result will be less smoky and savory than the meat version, so taste the vegetable mixture before assembling and adjust the seasoning.

Swap the cheddar for mature English cheddar, which gives a sharper flavor, or leave out the cheese for a less rich casserole. Add 1 cup (150 g) diced bell pepper with the onion, or replace the tomato with ½ cup (75 g) halved cherry tomatoes. For a more distinctly British touch, use a small amount of black pudding in place of some bacon; cook it thoroughly according to package directions and avoid adding extra salt until you have tasted the filling.

For a gluten-free version, use sturdy gluten-free bread and confirm that the sausage and baked beans are labeled gluten-free. If you want a softer, more egg-forward texture, reduce the bread to 4 slices (about 4 ounces/115 g); the casserole will be less firm and should still be baked until the center reaches 160°F (71°C).

Storage and Reheating

Refrigerate leftovers within 2 hours of baking in a covered container. They keep for 3–4 days in the refrigerator. For longer storage, freeze tightly wrapped individual portions for up to 2 months; thaw overnight in the refrigerator before reheating for the most even result.

Reheat portions in a 325°F (165°C) oven, covered loosely with foil, until the center reaches 165°F (74°C). This usually takes 15–25 minutes for refrigerated portions, depending on thickness. A microwave also works: cover the portion and heat in short intervals, turning or rearranging as needed, until it reaches 165°F (74°C) throughout. Avoid leaving cooked casserole at room temperature for more than 2 hours.

Frequently Asked Questions

Can I assemble the casserole the night before?
You can prepare and refrigerate the cooked meat and vegetable filling separately, then assemble in the morning. For best texture and food safety, avoid soaking the bread in raw egg mixture overnight; if you do assemble ahead, cover and refrigerate promptly, bake directly from the refrigerator, and allow extra baking time while checking the center reaches 160°F (71°C).

Can I use frozen hash browns instead of bread?
Yes. Use 3 cups (about 450 g) thawed, shredded hash browns in place of the bread. Squeeze out excess moisture and spread them in the dish before adding the filling and egg mixture. The casserole will be more like a breakfast bake than a bread pudding, and may need a few extra minutes in the oven.

How can I tell when it is done?
The center should look set rather than liquid, and a food thermometer inserted in the middle should read at least 160°F (71°C), the USDA FSIS safe minimum for egg dishes. Check more than one central spot if the dish is deep or the ingredients are unevenly distributed.

Why is my casserole watery?
Mushrooms and tomatoes release moisture, while excess bacon or sausage fat can make the base greasy. Cook the vegetables until their liquid has mostly evaporated, drain excess drippings, and seed a particularly juicy tomato. Also make sure the casserole is fully set before serving.

Can I make it without baked beans?
Yes. Leave them out and add another ½ cup (75 g) diced tomato or ½ cup (75 g) sautéed mushrooms if you like. Baked beans add a sweet, saucy note associated with a full English breakfast, so omitting them makes the casserole less traditional in flavor but still satisfying.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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