clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon
slice of sausage, spinach and egg casserole

Sausage, Egg, and Cheese Casserole with Spinach

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

5 from 7 reviews


Use the proportions below as a guide. You can omit the sausage to make it vegetarian — I almost always make it without sausage these days. If you want to scale it up or down, a good rule of thumb is 1/2 teaspoon kosher salt (Diamond Crystal brand) for every 4 eggs… use even less if using Morton’s Kosher salt. 

Update: I’ve increased the oven temperature from 250ºF to 325ºF — when I made this most recently at the lower temperature it took way too long to cook, though my oven has been acting up. If you’ve had success at the lower temperature, go for it. Otherwise, try 325ºF, which will have this casserole done in just about 30 minutes. 

Also: I now add a cup of half and half. I think including some sort of milk product — milk, cream or half and half — makes the eggs more forgiving. When you overcook this casserole when it is eggs alone, it can be a bit rubbery tasting. When dairy is added, I find it remains more custardy. When I think about my favorite egg custard dish, Tartine’s Quiche, which calls for 2 cups of dairy (milk and crème fraîche) for 5 eggs, it makes me want to try this with yet another cup of half and half. I will be sure to report back when I do. 

Finally: When I make it vegetarian, I simply sauté the onions for about 10 minutes; then fold in the spinach just until it wilts. Then I proceed with the recipe as usual. 


  • 2– to  4-oz baby spinach (I typically use 4 ounces)
  • 1 tablespoon olive oil, plus more as needed
  • 0.50.75 lb. hot Italian sausage, optional
  • 1 yellow onion, thinly sliced or diced
  • 1 to 1.5 teaspoons kosher salt, plus more as needed
  • 4 oz. grated cheese, I like Gruyère or Fontina
  • 12 eggs
  • 1 cup half and half
  • freshly cracked black pepper to taste.


  1. Heat oven to 325ºF. Place spinach in a large colander and set it in the sink. Grease a 9×13-inch pan lightly with butter or with nonstick spray.
  2. In a medium skillet over medium-high heat, heat the oil till it shimmers. Cook the sausage till it browns and is nearly cooked through, about 5 minutes. Break it up with a spoon or a spatula as it cooks. Spoon the sausage over the spinach in the colander in the sink. Return the skillet to the stovetop, add a little bit more oil to the pan if necessary, and set it over medium heat. Add the onions. Season with salt. Cook the onions till they begin to caramelize, 7 to 10 minutes. Spoon the onions over the sausage and toss with a spatula or large spoon to gently wilt the spinach. Transfer the spinach-sausage mixture to the prepared pan. Spread the cheese over top.
  3. Break the eggs into a large bowl, season with 1 to 1.5 teaspoons salt (when I am using Morton’s kosher salt, I use 1 teaspoon; when I use Diamond Crystal, I use 1.5 teaspoons) and fresh cracked pepper to taste. Add the half and half, and beat with a whisk until the mixture is well blended. Pour the eggs into the pan. Season with more pepper to taste. (Note: You can strategically pull leaves of the spinach from the custard so they are at the very top, where they will stay during the baking process — this is purely for visual effect.) Transfer pan to the oven and bake for 25-40 minutes, rotating the pan halfway through. Start checking at 25 minutes, then every 5 minutes thereafter till it’s done — depending on your oven and the material of the pan you are using, it may take more or less time to cook.
  4. Remove pan from the oven, and let it cool for 5 minutes before serving.
  • Prep Time: 20 minutes
  • Cook Time: 40 minutes
  • Category: Breakfast
  • Method: Oven
  • Cuisine: American