Dairy Free Chicken Sausage Breakfast Casserole

This delicious breakfast casserole is dairy free and loaded with chicken sausage. We’re using salsa to adds tons of flavor too! Enjoy for a fun weekend breakfast, dinner, or use it as your meal prep breakfast for the week!

Update: This recipe was originally published in 2019 and has been republished with all new photos.

I’ve always been a fan of breakfast casseroles and frittatas because you can incorporate so many simple ingredients to create a special breakfast that really wows. It’s such a great solution whether you’re feeding a crowd on a Saturday morning or whipping it up on a Sunday afternoon for the perfect make ahead breakfast to eat on busy mornings all week long.

I have several versions that include cheese so it was important to me to give you an option that’s dairy free. This one may be cheese-free but I am telling you we are not sacrificing flavor here. The salsa is an easy way to really amp up flavor without using a lot of seasonings. The shredded potato creates a beautiful crust at the bottom and ensures this is a hearty breakfast.

If you’re craving a more traditional breakfast casserole try my Sausage Cheddar Breakfast Casserole. More dairy free options include my Dairy Free Taco Breakfast Casserole and Dairy Free Mexican Breakfast Casserole.

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Dairy Free Chicken Sausage Breakfast Casserole Ingredients

• Olive or avocado oil: Extra virgin olive oil is my favorite to sauté the sausage and onion. A high quality avocado oil is a solid solution as well.
• Fully-cooked chicken sausages: Use whatever chicken sausage you enjoy best. I like Applegate Chicken Sausage (the one from the refrigerated case and not the frozen section of the grocery store) because their ingredient list is incredible. Aidell’s is another great brand you may prefer! Beef, pork, or turkey sausage are all delicious in here too.
• Onion: I recommend a white or yellow onion in this breakfast casserole.
• Eggs: We’re whisking large eggs with salsa for maximum flavor. No milk needed for fluffy eggs!
• Salsa: Any store-bought salsa works. If you’re not wanting any heat opt for a mild or medium heat salsa. If you like spice choose a spicier salsa.
• Spinach: Spinach is filled with antioxidants, vitamin K (one cup has almost double the daily requirement), and iron. It’s considered one of the best superfoods! So toss it in your healthy breakfast casserole. You won’t notice the flavor but it will do your body so much good!
• Frozen shredded potatoes: I prefer frozen riced sweet potato or frozen shredded sweet potato in this casserole because the touch of sweetness is a nice contrast to the savory ingredients. You’ll find it in the freezer case in your grocery store with french fries and other frozen potato products. If you have trouble finding it or just don’t love sweet potatoes opt for shredded hash browns instead.
• Salt and black pepper: Salt and pepper are the only seasonings you need because the salsa adds so much flavor already.

How to Make Dairy Free Chicken Sausage Breakfast Casserole

To start you’ll sauté onion and chicken sausage. While that’s happening whisk together eggs, salsa, and seasonings in a large bowl. (I absolutely love adding salsa to eggs. It’s an especially tasty cooking hack for breakfast casseroles and frittata because the salsa adds so much flavor with so little effort.)

Now it’s time to fill the baking dish. Grease the bottom and sides of a 9×13 dish with oil or a cooking spray. Spread the frozen potatoes in an even layer in the bottom of the greased baking dish. Top with baby spinach along with the sautéed onion and sausage mixture. Pour your egg mixture over everything. You’re ready for the preheated oven!

Once it’s finished cooking let it sit for a few minutes before slicing into individual servings. Enjoy as is or top with green onion, fresh herbs, or hot sauce.

What Kind of Sausage is Best in This Breakfast Casserole?

The type of sausage you use is up to you but be sure it’s a fully cooked sausage. Chicken, beef, turkey, or pork sausage are all great options.

I prefer Applegate Chicken Sausage (the one from the refrigerated case and not the frozen section of the grocery store) because their ingredient list is incredible and I’ve never tried one of their varieties that I didn’t like. Aidell’s is another great brand you may enjoy! If you’d like to make this a spicier dish you can always opt for a spicy sausage.

Can You Add Cheese to This Breakfast Casserole?

Sure! I designed this to be tasty without any cheese at all but you’re welcome to add cheese if you like. I recommend 1 cup shredded cheddar cheese. A cup of vegan or dairy-free cheddar cheese is a great option too. Spread it over everything in the casserole dish right before adding the egg mixture.

Can You Prep This Breakfast Casserole in Advance?

Yes! Assemble the casserole, refrigerate it covered overnight, and pop it in the oven (with no cover) the next morning.

How to Store Leftover Breakfast Casserole

Leftovers can be stored in an airtight container in the refrigerator for up to 4 days.

How to Serve This Breakfast Casserole

Because this is a hearty dish I love this savory breakfast casserole with just fresh fruit or a simple salad. If you’re wanting a side of potatoes I recommend my Easy Diced Air Fryer Potatoes, Easy Seasoned Roasted Potatoes, or Skillet Breakfast Potatoes.

Don’t forget how yummy this would be for Christmas morning. I love this for a holiday breakfast!

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