Family Suppers Breakfast Pans

Freezer Breakfast Biscuit Casserole

A freezer-ready breakfast casserole with biscuit pieces, eggs, sausage, and cheese that thaws and reheats into a real family breakfast instead of a soggy pan.

  • By Ruthann
  • Published March 17, 2026
  • Last reviewed March 17, 2026
  • Total time 70 min
  • Yield 10 servings

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If this is your kind of supper, breakfast, or bake, keepButtermilk Biscuits by the Dozen, Milk-and-Egg Veggie Breakfast Casserole, and Oatmeal Blender Pancakes for the Freezer nearby for the next pan.

If you want a cleaner fix or a little backup, these guides helpHow to Cool Big Pots Safely and When Eggs, Milk, and Cultured Dairy Carry the Bake.

If you want the household logic around this pan, keepBy Wednesday, the Supper Plan Breaks — Here Is How We Catch It and Before the Freezer Fills Wrong — Here Is What Earns the Space nearby too.

This is the kind of freezer breakfast that earns its space because it actually comes back well later. Biscuit pieces give it more body than plain bread, and the sausage and eggs make it feel like a meal instead of a tray of breakfast scraps held together with custard.

Recipe Rescue

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Recipe details

Timing & yield

Prep
25 minutes
Cook / bake
45 minutes
Total
70 minutes
Yield
10 servings

Ingredients

Skillet base

  • 1 pound breakfast sausage
  • 1 small onion, diced
  • 1 red bell pepper, diced
  • 1 teaspoon kosher salt, divided
  • 1/2 teaspoon black pepper, divided

Casserole

  • 8 baked biscuits, cut into chunks
  • 10 large eggs
  • 3 cups milk
  • 1 teaspoon dry mustard
  • 1 1/2 cups shredded cheddar cheese

Method

  1. Step 1. Heat the oven to 350 degrees Fahrenheit and grease a 9x13 baking dish.
  2. Step 2. Brown the sausage in a skillet over medium heat, then add the onion and bell pepper and cook until softened.
  3. Step 3. Spread the biscuit pieces in the baking dish and scatter the sausage mixture over the top.
  4. Step 4. In a bowl, whisk the eggs, milk, dry mustard, half the salt, and half the pepper until evenly blended.
  5. Step 5. Pour the custard over the biscuit mixture, press lightly so the bread contacts the liquid, then top with the cheese and remaining salt and pepper.
  6. Step 6. For baking right away, bake for 40 to 45 minutes until the center reaches 160 degrees Fahrenheit and the middle no longer ripples.
  7. Step 7. For freezing, cool the assembled unbaked casserole completely, wrap tightly, and freeze for up to 2 months. Thaw overnight in the refrigerator before baking.
  8. Step 8. Rest the casserole 10 minutes before serving so the custard settles and the biscuit pieces hold together better.

Equipment

  • skillet
  • mixing bowl
  • 9x13 baking dish

Storage & safety

Refrigerate baked leftovers within 2 hours and use within 4 days. Reheat covered so the eggs stay tender and the biscuit pieces do not harden around the edges.

Safe minimum internal temperature: 160°F

Rest time: 10 minutes

Cool the assembled casserole completely before freezing, and refrigerate thawed casserole overnight rather than on the counter.

Reheat leftovers to 165°F before serving hot again.

Egg casseroles should be fully set in the center before serving.

Troubleshooting

The casserole turned soggy
The biscuits were likely too soft or the pan needed a little more bake time. Warm uncovered for a few more minutes so the top can firm.
The center stayed loose
Bake longer until the middle reaches 160 degrees Fahrenheit and no longer shivers when nudged.

Recipe rescue notes

The freezer pan separated a little after baking

Likely cause: The casserole went into the freezer too warm or was reheated too hard.

Fix: Let the hot pan rest, then spoon the center and edges together before serving so the texture comes back under control.

Next time: Cool fully before freezing and reheat gently rather than blasting the pan hard.

Substitutions

Baked biscuits
Use day-old sandwich bread or English muffins. — Keep the bread sturdy enough to hold the custard without collapsing into paste.

Carryover / Next Meal Ideas

Breakfast burrito filling

Chop reheated leftovers and tuck them into tortillas for a second breakfast that still feels planned.

  • Serve with salsa if you want a brighter finish after reheating.

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