Cranberry Sausage Breakfast Casserole

The kitchen smelled like chaos the morning after Thanksgiving, leftovers scattered everywhere and the dog asleep under the table. I spotted the cranberry sauce nobody touched, a half pound of loose sausage in the fridge, and a stale loaf of sourdough that had seen better days. Forty minutes later, the whole house was perfumed with sage and browning cheese, and my family stopped asking what was for breakfast.

My sister in law took one bite, closed her eyes, and said absolutely nothing for a full minute. That silence told me everything I needed to know about what had just come out of my oven.

Ingredients

• 1 pound breakfast sausage, casing removed: Pork brings the classic flavor but turkey works beautifully if you want something lighter.
• 1 medium onion, finely chopped: Yellow onion is your best bet here for its natural sweetness.
• 2 celery stalks, diced: Finely diced so nobody gets a stringy surprise.
• 1 cup fresh or frozen cranberries: Frozen cranberries work straight from the bag, no thawing needed.
• 6 cups cubed day old bread: Sourdough or French bread that has dried out slightly absorbs the custard without turning to mush.
• 1 1/2 cups whole milk and 1 cup heavy cream: This combination creates a custard that is rich but not overwhelmingly heavy.
• 6 large eggs: The backbone of the custard that holds everything together.
• 1 cup shredded sharp cheddar cheese: Sharp cheddar stands up to the bold sausage flavor where mild cheese would disappear.
• 1/4 cup grated Parmesan cheese, optional: A dusty layer on top creates that irresistible golden crust.
• 2 tablespoons chopped fresh parsley: Fresh parsley brightens every forkful and makes it look as good as it tastes.
• 2 teaspoons dried sage: Sage is what makes this taste like the holidays in a single bite.
• 1 teaspoon dried thyme: Thyme adds an earthy depth that rounds out the herb profile.
• 3/4 teaspoon kosher salt: Adjust depending on how salty your sausage is.
• 1/2 teaspoon ground black pepper: Fresh cracked pepper makes a real difference here.
• 1/4 teaspoon crushed red pepper flakes, optional: Just enough warmth to keep things interesting without overwhelming anyone.
• Butter or nonstick spray for greasing: Do not skip this or you will be chiseling casserole off the pan later.

Instructions

Preheat and prepare your dish:

Set your oven to 350 degrees F and generously butter a 9 by 13 inch baking dish, making sure to get into the corners.

Brown the sausage:

Crumble the sausage into a large skillet over medium heat and cook until completely browned and no pink remains, about 6 to 8 minutes. Use a slotted spoon to transfer the meat to a plate, leaving the rendered fat behind.

Soften the aromatics:

In that same flavorful skillet, cook the chopped onion and diced celery until they are soft and translucent, roughly 5 minutes. The vegetables will pick up every bit of sausage flavor left in the pan.

Build the filling:

In a very large bowl, toss together the cubed bread, cooked sausage, softened onion and celery, cranberries, parsley, sage, thyme, salt, pepper, and red pepper flakes. Get your hands in there and mix until everything is evenly distributed.

Whisk the custard:

In a separate bowl, whisk the milk, cream, and eggs until smooth, then stir in the shredded cheddar and Parmesan if using. Pour this mixture over the bread and gently fold until every piece is moistened.

Assemble and rest:

Transfer the mixture to your prepared baking dish and spread it into an even layer. Let it sit for about 10 minutes so the bread soaks up all that custard goodness.

Bake until golden:

Bake uncovered for 45 to 50 minutes until the top is deeply golden and the center is set with no visible jiggle when you gently shake the dish.

Rest and serve:

Let the casserole cool for about 10 minutes before slicing. Scatter extra fresh parsley over the top if you want it to look as beautiful as it smells.

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That casserole became our unofficial day after Thanksgiving tradition, the one dish everyone requests before the turkey even goes into the oven.

Making It Your Own

Dried cranberries work if that is what you have, just soak them in hot water for 10 minutes first and reduce the amount to two thirds of a cup. My friend swaps in browned mushrooms and cooked lentils for the sausage and swears her vegetarian version rivals the original.

What to Serve Alongside

A simple green salad with a bright vinaigrette cuts through the richness beautifully. Fresh fruit on the side keeps things feeling light enough that nobody rolls back to bed afterward.

Storage and Reheating

Leftovers keep well in the fridge for up to four days and reheat in the microwave in about a minute and a half. I actually think the flavors deepen overnight, making the second day slices even better than the first.

• Cover tightly with foil before refrigerating to keep the edges from drying out.
• Individual portions freeze well for up to two months, just wrap them tightly.
• Always reheat until steaming hot throughout before serving again.

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Some recipes are just food, but this one is the reason people wander into the kitchen before sunrise on a holiday weekend.

Recipe Questions

→ Can I assemble this casserole the night before?

Yes. Prepare the casserole through step 7, cover tightly, and refrigerate overnight. In the morning, bake uncovered at 350°F for 50–55 minutes until golden and set in the center.

→ What type of bread works best?

Day-old French bread or sourdough works best because it absorbs the custard without turning mushy. Cut the bread into even cubes and let them dry out slightly for the best texture.

→ Can I use dried cranberries instead of fresh?

Yes. Reduce the amount to ⅔ cup and soak the dried cranberries in hot water for 10 minutes, then drain well before adding them to the mixture.

→ How do I know when the casserole is done baking?

The casserole is ready when the top is golden brown and the center is set — a knife inserted in the middle should come out clean. This typically takes 45–50 minutes at 350°F.

→ Can I make a vegetarian version?

Absolutely. Omit the sausage and add sautéed mushrooms or cooked lentils in its place. Adjust the salt to taste, since sausage adds seasoning on its own.

→ How should I store and reheat leftovers?

Store leftovers covered in the refrigerator for up to 3 days. Reheat individual portions in the microwave for 60–90 seconds, or warm the entire dish in a 325°F oven until heated through.