This gluten-free breakfast casserole is a warm hug on a plate! Packed with eggs, veggies, cheese, and gluten-free bread, it’s hearty and delicious.
Perfect for busy mornings or lazy weekends, I love how it fills up my plate and my belly without the gluten! It’s easy to make ahead, then just heat and eat!
Key Ingredients & Substitutions
Eggs: These are the binding force of your casserole. I like using large eggs for their rich flavor. If you’re vegan or egg-free, you can substitute with a flaxseed mixture (1 tablespoon flaxseed meal plus 2.5 tablespoons water per egg).
Gluten-Free Bread: The texture comes from gluten-free bread cubes. Day-old bread works best since it soaks up the egg mixture without getting mushy. You can use store-bought gluten-free bread or make your own. If you need a low-carb option, consider using cauliflower rice instead!
Cheddar Cheese: Shredded cheddar adds great flavor! Feel free to use a dairy-free cheese alternative if you’re dairy-free. I often mix different cheeses like mozzarella or pepper jack for added creaminess or spice.
Breakfast Sausage & Bacon: These add protein and flavor. Vegetarian sausage crumbles or tempeh work as substitutes if you’re looking for a meatless option. You can totally skip the meat, too, and add more veggies!
What’s the Best Way to Ensure Your Casserole Sets Perfectly?
For a casserole that sets just right, focus on the egg and bread ratio. Make sure your bread is well-coated with the egg mixture. You want it to soak in without being overly soggy.
- Mix the eggs, milk, and seasonings until smooth.
- Add the bread cubes and let it sit for 5–10 minutes before baking. This allows the bread to absorb the goodness!
- Check for doneness by inserting a knife; it should come out clean when done.
Let it rest after baking to maintain its shape and slice easily. Enjoy your breakfast with a side of fresh fruit for a refreshing touch!

How to Make a Delicious Gluten Free Breakfast Casserole
Ingredients You’ll Need:
For the Casserole:
- 6 large eggs
- 1 cup milk (dairy or dairy-free)
- 4 cups gluten-free bread cubes (day-old or toasted)
- 1 cup shredded cheddar cheese
- 1/2 cup cooked breakfast sausage, crumbled
- 1/2 cup cooked bacon, chopped
- 1/2 cup chopped red bell pepper
- 1/4 cup chopped onion
- 2 cloves garlic, minced
- 1 tsp dried oregano
- 1/2 tsp dried thyme
- 1/2 tsp salt
- 1/4 tsp black pepper
- Butter or non-stick spray for greasing the baking dish
For Garnishing:
- Fresh strawberries or your choice of fruit (optional)
How Much Time Will You Need?
This tasty breakfast casserole takes about 15 minutes to prepare and 35 to 45 minutes to bake, for a total of about 1 hour. Perfect for a relaxing morning or for prepping ahead!
Step-by-Step Instructions:
1. Preheat and Prepare:
Start by preheating your oven to 350°F (175°C). Grease an 8×8-inch baking dish with butter or non-stick spray. If you’d like easier removal later, you can line it with parchment paper.
2. Mix the Egg Base:
In a large mixing bowl, whisk together the eggs, milk, minced garlic, dried oregano, thyme, salt, and black pepper. Make sure everything is well combined and fluffy!
3. Combine Ingredients:
Next, stir in the gluten-free bread cubes, crumbled sausage, chopped bacon, red bell pepper, and onion. Mix it all gently to ensure the bread is well coated with the egg mixture.
4. Add Cheese and Fill the Dish:
Add half of the shredded cheddar cheese and fold it into the mixture. Then, pour the entire mixture into the prepared baking dish and spread it evenly.
5. Cheese It Up!
Sprinkle the remaining cheddar cheese over the top of the casserole for that delicious cheesy goodness.
6. Bake to Perfection:
Place your casserole in the oven and bake for 35 to 45 minutes. You’ll know it’s ready when it’s set in the middle and the top is golden brown.
7. Cool and Serve:
When the casserole is done baking, remove it from the oven and let it cool for about 5 minutes. This will make it easier to slice. If you like, garnish with fresh sliced strawberries or your favorite fruit before serving.
8. Enjoy!
Serve warm and enjoy your hearty, gluten-free breakfast casserole! It’s perfect for family breakfasts or meal prep for the week!
This casserole is super versatile and can be adjusted to your taste. Feel free to add more veggies or use different cheeses based on what you have. Enjoy your cooking!
Can I Use Other Types of Bread?
Absolutely! Other gluten-free breads, like sourdough or whole grain, can add different flavors and textures. Just make sure the bread is gluten-free and preferably a bit stale to absorb the egg mixture better.
Can I Make This Casserole Ahead of Time?
Yes! You can prepare the casserole the night before and store it in the fridge. Just cover it tightly. In the morning, you can bake it directly from the fridge; it may need a few extra minutes in the oven.
How to Store Leftovers?
Leftovers can be stored in an airtight container in the fridge for up to 3 days. To reheat, place individual portions in the microwave or warm them in the oven until heated through.
Can I Substitute the Meat?
Definitely! If you want a vegetarian option, you can skip the sausage and bacon altogether or replace them with sautéed mushrooms, spinach, or any of your favorite veggies for added flavor and nutrition.



