Sausage Croissant Breakfast Casserole Recipe

Christmas morning at my house starts with this casserole in the oven at 7 a.m. — which means I assembled it the night before, covered it with foil, and slept like a person with nothing to worry about.

The crescent roll dough bakes into a flaky, buttery base, the Jimmy Dean sausage gives every bite that savory punch, and the egg and mozzarella layer sets into something that’s firm enough to pick up with your hands but still rich and custardy inside. It feeds eight adults without any stress, and I have never once had a piece come back uneaten.

What Makes This Breakfast Easy

• The crescent roll base does double duty. It soaks up just enough of the egg custard to stay sturdy while still baking up light and flaky — no soggy bottom, no crumbling crust.
• Jimmy Dean pork sausage is the move. I’ve tried other brands and they’re fine, but Jimmy Dean has the right fat content and seasoning to hold up in a baked casserole without turning greasy or bland.
• Mozzarella melts clean. Some cheeses get oily or grainy when baked into an egg casserole. Mozzarella stays creamy and pulls into those satisfying stretchy layers without overwhelming the other flavors.
• The overnight soak is the secret weapon. Mixing the eggs, milk, and seasonings the night before — and letting the crescent roll base pre-soak — means the custard is fully absorbed and the whole casserole bakes evenly from edge to center.
• It scales for a crowd. Eight generous servings from one 9×13 pan. If you’re feeding twelve, use a second pan — the recipe doubles perfectly.

What to Know Before You Start

The biggest thing to know going in is that this casserole rewards a little advance planning. If you’re making it for Christmas morning, a holiday brunch, or any day when you want breakfast done and off your plate mentally, assemble it the night before.

Roll out the crescent dough into the pan, layer on the cooked sausage, whisk the eggs with the milk and salt and pepper, pour it over, and let it sit covered in the fridge overnight. By morning, the dough has soaked up the custard and everything is ready to go straight into a 425-degree oven.

Cook and drain your sausage completely before adding it to the casserole. Jimmy Dean pork sausage has good flavor but it needs to be fully cooked and drained — any extra grease left in the pan will make the egg layer greasy rather than custardy.

I cook it in a skillet, break it up fine, drain it on a paper towel, and let it cool before layering it in. If you’re prepping the night before, you can cook the sausage in the afternoon and store it in the fridge until you assemble.

One more thing: let the casserole rest for five minutes after it comes out of the oven. I know it smells incredible and everyone is standing around the kitchen, but a five-minute rest lets the egg custard firm up enough to slice cleanly.

Cut it too soon and it slides; give it a few minutes and it comes out in neat squares you can actually serve without making a mess.

Ingredients

• 1 pound Jimmy Dean ground pork sausage, cooked, drained, and crumbled
• 1 (8-oz.) package refrigerated crescent roll dough
• 2 cups shredded mozzarella cheese
• 4 large eggs, beaten
• 3/4 cup whole milk
• Salt and pepper to taste
• Butter or cooking spray for the pan

For the pan, I use a glass 9×13 baking dish — the glass heats evenly and you can actually see the egg set on the bottom before you pull it, which takes the guesswork out of doneness. A metal pan will work but you lose that visual check.

For mixing the egg custard, a balloon whisk incorporates the eggs and cream fully without leaving streaks of yolk in the custard layer — it’s the kind of small thing that makes the finished texture noticeably smoother.

How to Make It

Step 1: Preheat and prep your pan. Heat your oven to 425°F.

Butter or spray your 9×13 baking dish generously — go all the way into the corners. The crescent dough can stick if the pan isn’t well-coated, and you don’t want to lose that flaky base when you’re trying to serve clean squares.

Step 2: Cook and drain the sausage. In a large skillet over medium heat, cook the Jimmy Dean pork sausage, breaking it up as you go, until it’s browned all the way through with no pink remaining — about 8 to 10 minutes.

The smell at this stage is half the reason everyone wanders into the kitchen. Drain the sausage on a paper towel and let it cool slightly before adding it to the casserole.

Hot sausage added directly can start to pre-cook the egg mixture unevenly.

Step 3: Lay the crescent roll dough. Open the crescent roll dough and unroll it into the prepared pan.

Press the seams together with your fingertips and work the dough into an even layer covering the bottom of the pan. It doesn’t need to be perfect — just close enough that you don’t have any big gaps.

The dough will puff and spread as it bakes, filling in minor imperfections.

Step 4: Add the sausage and cheese. Spread the cooked, drained sausage evenly over the crescent dough layer.

Sprinkle the shredded mozzarella evenly over the top of the sausage. At this point it smells like a diner in the best possible way.

Step 5: Mix and pour the egg custard. In a mixing bowl, whisk together the 4 eggs, 3/4 cup milk, salt, and pepper until fully combined with no visible streaks of yolk.

A balloon whisk does this better than a fork — you want the mixture completely smooth so the custard layer bakes evenly. Pour the egg mixture slowly and evenly over the sausage and cheese.

Let it settle for a minute so it distributes through the gaps in the sausage layer.

Step 6: Bake. Place the casserole in the preheated 425°F oven and bake for 15 to 20 minutes, until the top is golden brown and a toothpick inserted in the center comes out clean.

If you’re using a glass dish, peek at the bottom — you’ll be able to see the egg custard fully set and the crescent dough turned golden through the glass. The casserole should be puffed and set all the way to the center, not jiggly.

Step 7: Rest and slice. Pull it from the oven and let it sit for 5 minutes before cutting.

I use a sharp spatula to cut into squares — press straight down and lift cleanly. Serve immediately with salsa on the side, a bowl of fresh fruit, and coffee.

That’s all it needs.

Helpful Tips

• Press the crescent seams firmly. The perforated lines in the dough are the weak points — take 30 seconds to press them together so the base bakes as one piece rather than separating into individual rolls.
• Drain the sausage well. Excess grease is the enemy of a clean custard layer. Drain on paper towels and even give it a gentle press — you want the sausage dry enough that it doesn’t leach grease into the egg mixture.
• Don’t skip the rest period. Five minutes off the oven makes the difference between clean squares and a sliding mess. Set a timer if you have to — it’s worth the wait.
• Shred your own mozzarella if you can. Pre-shredded cheese is coated with anti-caking agents that make it melt slightly less smoothly. A block of low-moisture mozzarella shredded fresh will melt cleaner and taste noticeably better.
• Salsa is not optional. A spoonful of good salsa on each serving brightens the whole dish. The acidity cuts through the richness of the egg custard in a way that makes you want a second piece.

Storage and Make-Ahead

The overnight make-ahead option is genuinely the best way to prepare this casserole, especially for holiday mornings. Assemble everything the night before — lay the crescent dough, add the cooked and cooled sausage, sprinkle the cheese, whisk and pour the egg mixture — then cover the pan tightly with foil or plastic wrap and refrigerate overnight.

The dough absorbs the custard as it sits, and when you pull it out the next morning it goes straight into a cold oven that preheats to 425°F while the casserole takes the chill off slightly. Bake as directed.

The overnight soak actually improves the texture — the custard layer is more evenly distributed and the base bakes up sturdier than when you cook it fresh.

Leftovers keep well. Store any remaining casserole covered in the refrigerator for up to four days.

Reheat individual squares in the microwave for about 60 to 90 seconds, or put the whole pan back in a 350°F oven covered with foil for 15 minutes until warmed through. The crescent base does soften a bit after refrigeration, but the flavor is still excellent — I’ve eaten this cold out of the fridge standing at the counter and had zero complaints.

This casserole does not freeze particularly well — the egg custard can turn watery when thawed and the crescent dough loses its texture. If you’re planning for a large group, better to make two fresh pans than to try to freeze one ahead.

The good news is that with the overnight prep option, you can have two pans ready to go in the fridge the night before without any morning stress.

Frequently Asked Questions

Can I use a different sausage?

Yes, but choose carefully. Jimmy Dean regular pork sausage is my go-to because the seasoning is well-balanced for a casserole and it holds up well when baked.

Hot Jimmy Dean adds a nice kick if your crowd likes heat. Maple-flavored sausage works if you want a slightly sweet-savory profile — my kids loved it.

Italian sausage (casings removed) works in a pinch but changes the flavor profile significantly. Whatever you use, cook it fully and drain it well before adding to the casserole.

Can I add vegetables?

Absolutely. Diced bell peppers, sliced mushrooms, and baby spinach all work well.

Sauté any vegetables before adding them — raw vegetables release water as they bake, which can make the custard watery and the base soggy. Add them on top of the sausage layer before you pour the egg mixture over.

Keep the total volume of add-ins to about a cup so the casserole doesn’t get overloaded and fail to set in the center.

Can I use a different cheese?

Mozzarella is ideal because it melts cleanly and doesn’t compete with the sausage flavor. Monterey Jack is a great substitute — it melts just as smoothly and adds a mild buttery note.

Cheddar works but can make the casserole slightly greasier and more assertively flavored. A blend of half mozzarella and half sharp cheddar is actually excellent if you want more cheese presence without going overboard.

Avoid fresh mozzarella — the water content is too high and it will make the custard watery.

How do I know when it’s done?

Two reliable tests: a toothpick inserted in the center comes out clean, and the casserole is puffed and set all the way through with no jiggle in the center when you gently shake the pan. If you’re using a glass baking dish, look at the bottom — you can see the crescent dough has turned golden and the egg is fully opaque all the way through.

Start checking at 15 minutes and go to 20 if needed. Ovens vary, and a cold-from-the-fridge overnight casserole may need the full 20 minutes.

Can I make this gluten-free?

The crescent roll dough is the main gluten source, and gluten-free crescent roll options are limited in most grocery stores. Pillsbury does not currently make a gluten-free version.

If you need a GF version, you could substitute a gluten-free biscuit dough pressed flat into the bottom of the pan, or skip the dough entirely and make a crustless egg casserole — press the sausage and cheese into the pan, pour the egg mixture over, and bake at 350°F until set. It’s a different dish, but still delicious.

Also double-check your sausage label — most Jimmy Dean products are gluten-free but verify on the current packaging.

What should I serve with it?

This casserole is rich and filling on its own, so I keep the sides simple. A bowl of fresh fruit — strawberries, grapes, cantaloupe — provides brightness and acidity that balances the savory richness.

Salsa on the side is my personal non-negotiable. A simple green salad with a light vinaigrette works well for a brunch spread.

If you’re feeding a big group, add a pitcher of orange juice and a pot of good coffee and you have everything you need for a complete holiday morning breakfast.

Related Recipes

• Biscuits and Gravy Casserole — all the comfort of biscuits and gravy in one make-ahead pan
• Quick Breakfast Casserole — when you need something on the table fast with minimal prep
• Breakfast Sausage Casserole — another sausage-forward casserole, this one with a hash brown base