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This dairy free breakfast casserole is a delicious, hearty dish full of eggs, potatoes, sausage, peppers, and onions. It’s an easy make-ahead meal.
A hearty breakfast is the best way to start a busy day. While we love pancakes and other sweet breakfasts in my house, sometimes a savory, protein-rich meal is in order.
This dairy free breakfast casserole is chock full of savory breakfast favorites. Eggs and sausage meet up with hash browns, peppers, and onions in this delicious dish. The flavors and textures in this meal make it irresistible.
Many people would add cheese to a dish like this, but it’s not necessary with all the other flavors working together so well here. Nobody misses the dairy in this meal.
Dairy Free Breakfast Casserole Step by Step Instructions
Step One: Prepare the Filling Ingredients
Place the olive oil in a non-stick large skillet and heat over medium heat. Add the breakfast sausage and cook to brown, stirring frequently (4 to 5 minutes). Add the diced onion and bell pepper and stir. Continue cooking over medium heat until the onions and pepper are tender.
Step Two: Prepare the Egg Mixture
In a large bowl, whisk the eggs, oat milk, mustard powder, onion powder, salt, and scallions.
Step Three: Place Sausage Mixture in Baking Dish
Place the cooked sausage and veggies, along with the shredded hash browns, in a greased 9 by 13 inch pan.
Step Four: Add the Egg Mixture and Bake
Pour the egg mixture on top of the cooked sausage and vegetables. Transfer the baking dish to the preheated oven (375 degrees) and bake for about 30 minutes, or until the egg mixture is set. Cooking times may vary due to oven variations. The mixture should be set and no longer jiggly in the middle. Serve this casserole warm.
Dairy Free Breakfast Casserole Tips and Frequently Asked Questions
I use breakfast sausage links that I get from my local meat share. You can use any sausage links you’d like, or try crumbled breakfast sausage. Alternately, you could use chopped cooked bacon. We also enjoy this recipe with plant-based sausage.
Frozen hash browns can go right into this recipe while still frozen. If your hash browns have salt in them, use less salt than the amount listed. And if your hash browns are defrosted, the cook time will be a bit shorter.
You can adapt this dairy-free breakfast casserole recipe by substituting chopped asparagus for the red pepper, use shallots instead of onions, or add some mushrooms or spinach for a different flavor. You can also skip the sausage for a vegetarian version. This dairy free breakfast casserole is a very flexible recipe that always comes out delicious.
This recipe can be served with fresh fruit for a simple, filling breakfast. I sometimes serve it for dinner with a salad. But it really has everything it needs for a complete meal right in the casserole, so it can also be served on its own.
Try my sweet potato breakfast hash for another delicious gluten-free, dairy-free breakfast recipe to start your day.
Dairy Free Breakfast Casserole
- 1 tbs. olive oil
- 12 ounces breakfast sausage links sliced
- 1/2 cup onion diced
- 1 cup red bell pepper diced
- 8 eggs
- 1 cup oat milk or other non-dairy milk
- 1 tsp. mustard powder
- 1/4 tsp. onion powder
- 1 1/2 tsp. salt
- 2 tbs. diced scallions
- 16 oz frozen shredded hash browns
- Preheat the oven to 375 degrees and grease a 9 x 13 inch pan.
- Place the olive oil in a large nonstick skillet and heat over medium heat. Add the breakfast sausage and cook to brown, stirring frequently (4 to 5 minutes). Add the diced onion and bell pepper and stir. Continue cooking over medium heat until the onions and pepper are tender (3 to 4 minutes).
- In a large bowl, whisk the eggs, oat milk, mustard powder, onion powder, salt, and scallions.
- Place the shredded hash browns and cooked sausage and pepper in the prepared 9 by 13 inch pan. Pour the egg mixture on top.
- Transfer to the oven and bake for 25 to 30 minutes, or until the egg mixture is set. Serve warm.
Approximate Nutrition Info
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Dairy-Free Egg Casserole Price Breakdown
This recipe costs $9.84 to make, or $1.23 per serving. Try this non-dairy breakfast casserole for an easy meal on Christmas morning or any time of year
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Note: This post was originally published in 2013, and it was updated in 2023.