Go Back Email Link
–+ servings
A slice of protein french toast casserole with sausage on a plate.

High Protein French Toast Casserole with Sausage

Author: Mika Kinney
5 from 2 votes
With flavorful sausage and a sweet vanilla custard filling, this protein french toast casserole is the ultimate weekend breakfast or meal prep.
Prep Time: 15 minutes
Total Time: 50 minutes
Protein: 24g
Serves: 8
Print Pin
Save Recipe Recipe Card

💌 Save to your inbox!

Send this recipe straight to your inbox by entering your email. As a bonus, you'll receive our top tips for getting more protein into your diet.

Equipment

  • 1 skillet
  • 1 9x11 baking dish

Ingredients

  • 1 loaf challah bread (cubbed)
  • 1 pound breakfast sausage (browned)
  • 5 eggs
  • ¾ cup vanilla protein powder (egg white protein powder, see notes for whey protein)
  • 2 cups almond milk (or any milk you like)
  • ¾ teaspoon salt
  • ¾ teaspoon cinnamon
  • ½ cup coconut sugar (or brown sugar)
  • 1 stick butter (equivalent to 8 tbsp)

Before you start!

If you make this recipe, please take a moment to leave us a review. We love to hear from you!

Instructions

  • Prepare by cubbing your 1 loaf challah bread and placing it in a 9x11 baking dish, preheat your oven to 350 degrees, and brown the 1 pound breakfast sausage.
  • Top the bread with the sausage. Stir it up a bit to mix the sausage and bread evenly. Its common for the bread to be over flowing at this point, just keep pressing it back in.
    Sausage on top of the bread in a pan.
  • Mix the 5 eggs, ¾ cup vanilla protein powder, 2 cups almond milk, ¾ teaspoon salt, and ¾ teaspoon cinnamon in a bowl and pour over the bread and sausage mixture. The protein powder may not fully mix but that's ok, it will dissolve as it bakes.
    Use a spoon or spatula to press the bread into, making sure each one has been soaked or coated in the mixture.
  • Melt 1 stick butter and mix with the ½ cup coconut sugar. Pour this over the casserole evenly.
    The coconut and butter mixture drizzled over the top of the bake.
  • Bake for 35-40 minutes or until golden brown.

Video

Notes

Expert Tips

  1. It’s ok if some lumps remain! Sometimes protein powder can be hard to fully mix so some will recommend using a blender. The issue is that you don’t want too many air bubbles in the eggs. The heat will help the lumps mix in, so don’t sweat it, just try to mix it as best you can.
  2. Press the bread down into the custard mixture using a spatula. We really want to make sure each piece is fully coated.
  3. If you use whey protein, the texture may be a bit denser than when using egg white protein.

Common Questions

Can I make this without protein powder?
Yes, you can make it without, I would just add 1 teaspoon vanilla and 1 tablespoon of maple syrup in place of the protein powder.
Can I make this with another type of bread?
Yes, you can use any soft bread. Challah and brioche both are sweet breads making them ideal. But, white bread, Hawaiian rolls, or even hamburger buns will work. I don’t recommend whole wheat bread unless you understand it will taste healthy if you make it with that.
Can I make this with sausage links?
Yup, you can dice up the breakfast sausage and brown it. I still recommend browning it because it adds that nice caramelized flavor.

Storage & meal prep tips 

Refrigerator

This will keep in an airtight container for up to 1 week.

Frozen

To freeze the entire tray, cover with plastic wrap, twice, then top with foil. To freeze individual pieces, wrap each one in plastic wrap and place it in an airtight container or plastic ziptop bag. They will keep for 3 months in the freezer.

Meal Prep & Making it in Advance

To meal prep this, just make as directed and then store individual slices in containers to grab as needed on the go. 
If you want to prepare this in advance, do the following:
  • Chop the bread and store in the bread bag or a plastic bag for up to 3 days.
  • Brown the sausage and store in the fridge for up to 3 days.
  • Mix the protein powder and egg mixture and store in ana air-tight container for up to 2 days.
  • When you’re ready to make it, simply combine everything and bake as directed.

Reheating

To reheat, just pop individual slices in the microwave for 45-60 seconds. Or heat the entire casserole in the oven at 350 degrees for 10-15 minutes or until heated through.

Looking for more information?

Additional substitution information can be found above in the substitution section of this post.

Nutrition Disclaimer

Nutritional information is an estimate and for informational purposes only.

Course: Breakfast
Cuisine: French
Keyword: french toast, high protein, protein powder

Nutrition

Calories: 487kcal | Carbohydrates: 45g | Protein: 24g | Fat: 25g | Saturated Fat: 6g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 10g | Trans Fat: 0.1g | Cholesterol: 192mg | Sodium: 1027mg | Potassium: 296mg | Fiber: 2g | Sugar: 15g | Vitamin A: 192IU | Vitamin C: 0.4mg | Calcium: 168mg | Iron: 1mg
Did you try this? We'd love to hear how it went. Please leave a review below! For more protein recipes join our email list!