Kitchen Sink Breakfast Casserole in a clear baking pan on a white table
Breakfast, Christmas, Recipe Video, Savory Breakfast

Kitchen Sink Breakfast Casserole


Kitchen sink breakfast casserole is the perfect way to use up what is left in your fridge for an easy & delicious breakfast!

First, if you don’t follow me on Insta then you need to head over and do that ASAP! Kitchen sink breakfast casserole was born over on Insta story and I have the original creation that my husband and I made together save on my highlights.

This breakfast casserole recipe is just a little bit of this and a little bit of that. An egg bake of sorts. Use what you have. Nothing fancy or fussy but is destined to be yummy every single time.

slice of Kitchen Sink Breakfast Casserole on a white plate with baking dosh in background

What Do You Need For Kitchen Sink Breakfast Casserole Recipe?

This casserole starts with a base of:

  • 3-4 Cups Bread*
  • 12 Eggs
  • 1 1/2 Cups Milk
  • 1 Cup Shredded Cheese*
  • 1/2 Teaspoon Salt and Pepper
ingredients needed for Kitchen Sink Breakfast Casserole

What Makes This Breakfast Casserole So Easy?

I have written this in a way of what I call a “no-recipe recipe’. Measurements and ingredient amounts are loose, to say the least, lol.

For your bread – use whatever you have. I love using croissants the best and we have had those on hand recently. But you could use whole wheat sandwich bread, white bread, sourdough bread, any type of sandwich bread, gluten-free bread, or even stale leftover hotdog or hamburger buns.

Literally any kind of carbs bread you have.

For your cheese – same as above. Use what you have in the fridge. Mozzarella, cheddar, pepper jack, parmesan, gruyere, swiss, goat cheese, Colby, American, etc etc etc.

Now for the Add-In’s

  • 1/2 Cup Meat
  • 1/2-1 Cup Veggies

Again, like above. Use anything. Bacon. Ham. Steak. Prosucitto.

Spinach, peppers, onions, tomatoes, mushrooms, fresh herbs.

You get the idea.

If you have some veggies that you have roasted that week, throw them in.

Have 1/2 a bag of spinach that needs to be used up quickly, add it in!

Literally anything and everything. There are no rules!

What Combinations Can I Make with Kitchen Sink Breakfast Casserole Recipe?

  • You can just go plain cheese
  • Cheese and Bacon – or any type of breakfast meat for your meat lovers out there
  • Cheese and Veggies – for all the vegetarians
  • Loaded supreme using all the different kinds of cheese’s, meats, and veggies

Kitchen sink breakfast casserole makes for great leftovers too. Enjoy this egg bake for up to 4 days after making (if you have any left). You can also easily half this recipe to make a smaller portion for 2-4 people.

Easy is the name of the game for this casserole. No rules. No-fuss. Just clean out your fridge and make something delicious everyone will enjoy!

slices out of Kitchen Sink Breakfast Casserole

Want More Breakfast Ideas? Here Are More Delicious Ideas!

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baked Kitchen Sink Breakfast Casserole in a clear baking dish

Kitchen Sink Breakfast Casserole

  • Author: Heather
  • Total Time: 60 Minutes
  • Yield: 8 1x


Kitchen sink breakfast casserole is the perfect way to use up what is left in your fridge for an easy breakfast!


  • 34 Cups Bread*
  • 12 Eggs
  • 1 1/2 Cups Milk
  • 1 Cup Shredded Cheese*
  • 1/2 Teaspoon Salt and Pepper


  • 1/2 Cup Meat*
  • 1/21 Cup Veggies*


  1. Preheat the oven to 350 degrees.
  2. Grease a 9×13 baking sheet with non-stick spray.
  3. Roughly tear your bread and place in the bottom of the pan.
  4. In a large bowl, add in the eggs, milk, salt, and pepper. Whisk until combined.
  5. Add in shredded cheese, and any meat and/or veggies you are using (if you are).
  6. Pour the egg mixture over the bread. Pat down the bread and make sure the egg mixture is evenly distributed over the whole pan.
  7. Place in the oven and bake for 45-50 minutes and until set in the middle. If the middle still jiggles, cook for another 5-10 minutes until set completely.
  8. Remove from the oven and cool for 5-10 minutes. Slice and enjoy!


  • Any type of bread can be used – sandwich, croissant, sourdough, whole wheat/white/gluten-free, etc
  • Any type of breakfast meat can be used – bacon, ham, prosciutto, steak, etc
  • Any type of veggies can be used – spinach, fresh herbs, peppers, onions, mushrooms, etc.
  • Prep Time: 10 Minutes
  • Cook Time: 50 Minutes
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American


  • Serving Size: 1 square
  • Calories: 293
  • Sugar: 3.8 g
  • Sodium: 478.7 mg
  • Fat: 13.9 g
  • Carbohydrates: 21.8 g
  • Fiber: 1 g
  • Protein: 19.3 g
  • Cholesterol: 298 mg

Keywords: Kitchen Sink Breakfast Casserole

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