I make a lot of breakfast casseroles. They are so easy to make and you can create whatever taste and flavors you want by mixing different ingredients. Usually, I make them up as I go along depending on whatever I have in my fridge and pantry. Leftover ham or sausage, different breads and I might use cheddar or Monterrey Jack cheese. It’s truly whatever I have on hand. But this one my friends, is by far the best breakfast casserole I make. It is so simple and has so few ingredients and yet it is better than all of the others. Why? More eggs that make a rich custard base. toasted buttery croissants. Heavy cream. Gruyere cheese. Those ingredients come together and make the most delicious casserole you will ever eat!
Simple Buttery Croissant Casserole
10 large eggs, beaten
1 cup heavy cream
2 cups Gruyère cheese, divided
2 teaspoons Dijon mustard (optional)
5–6 croissants, torn into small pieces
Toast your croissants pieces in the oven at 350 for about 10 minutes or until they are golden brown and just slightly crispy. Remove from the oven and allow to cool. Leave the oven on at 350 degrees.
In a large bowl, whisk the eggs with the cream, Dijon and salt and pepper.
Spray a baking dish with non-stick spray or grease it with butter. You can use a 9 x 13, which is standard, but I like my casserole thicker so I use a 10 x 7 -inch dish.
Arrange the toasted croissant pieces in the bottom of the dish.
Sprinkle the top with half the cheese. At this point you could add other ingredients such as ham, sausage, veggies, etc. But this casserole is just perfect as is without any other fillers.
Pour eggs all over the top, making sure you cover as much of the croissants as you can. Take the back of a spoon or spatula and press down any croissants that are not covered in the egg mixture.
Add the other half of the cheese on top and cover with aluminum foil shiny side up. You want the non-stick part facing the casserole.
Bake for 30-40 minutes, depending on what size pan you used. Remove foil and bake for another 5-10 minutes. You don’t want to overcook the eggs. The middle of the casserole should be firm if you shake the dish a little. You will notice the entire casserole has puffed up beautifully.
You can also do a test by inserting a skewer or knife in the very middle of the casserole to make sure it comes out clean or just cheesy and not runny egg.
Cut into squares and serve warm. So Good!
Want a bite?
Store covered in the refrigerated for up to 3 days. For leftovers, heat in microwave.
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