Overnight High Protein Brioche French Toast Casserole

Oh, sweet friends, there’s nothing quite like waking up to the aroma of a comforting breakfast baking, especially when it’s an Overnight High Protein Brioche French Toast Casserole. This dish is a true morning marvel, transforming fluffy brioche into a golden, custardy dream with a delightful crunch, making every bite feel like a warm hug. It’s the kind of magical treat that whispers of cozy mornings and cherished memories.

I still remember my grandmother’s kitchen, sunlight streaming in as she’d pull a bubbling breakfast casserole from the oven. The joy on everyone’s faces as we gathered around the table sparked my lifelong love for creating sweet moments through food. This recipe, much like those mornings, is about slowing down and savoring.

This casserole is not only incredibly easy to prepare the night before, making your mornings stress-free, but it also packs a wonderful protein punch to keep you energized. My top tip for any overnight bake? Always make sure your bread is slightly stale – it truly soaks up all that delicious custard without getting soggy!

What You Need to Make This Recipe

For this delightful casserole, we combine rich brioche, eggs for protein, and a hint of vanilla protein powder. I always find pure vanilla extract deepens flavors beautifully in this High Protein Brioche French Toast Casserole. The full list of ingredients and measurements are in the recipe card below, ready for your baking adventure!

How to Make High Protein Brioche French Toast Casserole

Crafting this comforting dish is simpler than you might imagine. You’ll cube brioche, arrange it in a dish, then whisk together a creamy, protein-packed custard. Pour it over the bread and let it soak overnight. The next morning, simply bake until golden and bubbly, then serve! It’s truly a joy to create this High Protein Brioche French Toast Casserole.

A sweet slice of pecan french toast casserole drizzled with icing on a plate with a fork and berries.

High Protein Brioche French Toast Casserole

Elevate your brunch game with this delightful High Protein Brioche French Toast Casserole, combining rich, buttery brioche with a protein-packed custard. Perfect for feeding a crowd, it can be prepped the night before for an easy morning meal.
Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings: 8 servings
Course: Breakfast, Brunch
Cuisine: American
Calories: 490

Ingredients
  

For the Casserole
  • 1 lb Brioche bread day-old, cut into 1-inch cubes
  • 10 Large eggs
  • 1.5 cup Egg whites from a carton
  • 2 cup Milk 2% or non-dairy milk
  • 0.5 cup Vanilla protein powder whey or plant-based
  • 0.5 cup Maple syrup plus more for serving
  • 2 tsp Vanilla extract
  • 1 tsp Ground cinnamon
  • 0.25 tsp Salt
For the Streusel Topping
  • 2 tbsp Unsalted butter melted
  • 0.25 cup Light brown sugar
  • 0.5 cup Chopped pecans or walnuts
For Serving (Optional)
  • 1 cup Fresh berries
  • 0.5 cup Greek yogurt plain or vanilla

Equipment

  • 9×13 inch baking dish
  • Large Mixing Bowl
  • Whisk
  • Measuring cups and spoons
  • Small bowl (for topping)

Method
 

Prepare the Casserole Base
  1. Lightly grease a 9×13 inch baking dish with butter or cooking spray. Arrange the brioche cubes evenly in the prepared dish.
  2. In a large mixing bowl, whisk together the large eggs, egg whites, milk, vanilla protein powder, maple syrup, vanilla extract, ground cinnamon, and salt until well combined and smooth. Ensure there are no lumps from the protein powder.
  3. Pour the egg mixture evenly over the brioche cubes in the baking dish. Gently press down on the bread with a spatula to ensure all the cubes are fully saturated with the liquid. Let it sit for at least 30 minutes at room temperature, or cover with plastic wrap and refrigerate for 4 hours or overnight for best results.
Bake the Casserole
  1. Preheat your oven to 375°F (190°C). If the casserole was refrigerated, remove it from the fridge while the oven preheats.
  2. While the oven preheats, prepare the streusel topping. In a small bowl, combine the melted butter, light brown sugar, and chopped pecans (or walnuts). Mix until crumbly.
  3. Uncover the baking dish and sprinkle the streusel topping evenly over the brioche mixture.
  4. Bake for 40-50 minutes, or until the casserole is golden brown on top, puffed, and set in the center. A knife inserted into the center should come out mostly clean.
  5. Remove from the oven and let the casserole cool for 5-10 minutes before serving. This allows it to set slightly.
Serve and Enjoy
  1. Serve warm, garnished with fresh berries, an extra drizzle of maple syrup, and a dollop of Greek yogurt for an added protein boost.

Notes

For an even richer flavor, you can add a tablespoon of orange zest to the egg mixture. This casserole is excellent for meal prepping; simply reheat individual portions in the microwave or oven. Leftovers can be stored in an airtight container in the refrigerator for up to 3-4 days.

Pro Tips for Making This High Protein Brioche French Toast Casserole

Getting that perfect balance of tender brioche and crisp topping in your High Protein Brioche French Toast Casserole comes down to a few sweet secrets I’ve learned over the years. These little touches ensure your casserole is a resounding success!


  • Bread Matters: I always recommend using slightly stale brioche. If your bread is fresh, simply slice it and leave it out on the counter uncovered for a few hours, or even overnight. This helps it absorb the custard without becoming mushy.



  • Don’t Rush the Soak: For truly custardy French toast, give it ample time to soak. Overnight is best, allowing all those lovely flavors to meld and the bread to fully absorb the liquid. It’s a patience game, but oh-so-worth it!



  • My Secret Trick: I always press the bread down gently into the custard a few times before letting it soak. This ensures every single cube gets fully saturated, leading to an incredibly tender and flavorful casserole throughout.


Fun Variations for High Protein Brioche French Toast Casserole

One of the most delightful things about baking is adding your own sprinkle of creativity! This High Protein Brioche French Toast Casserole is a wonderful canvas for playful variations, letting you tailor it to your family’s favorites or whatever seasonal delights you have on hand.

Seasonal Berry Delight

My sister always asks me to swirl in a bit of raspberry jam or a handful of extra mixed berries into the custard before baking. It adds a burst of fruity brightness that’s just heavenly. Think fresh peaches in summer or cranberries during the holidays!

Nutty Indulgence

For those who love a bit more crunch, consider swapping out pecans or walnuts for toasted slivered almonds or even a sprinkle of shredded coconut in the topping. A friend loves when I add a tablespoon of almond extract alongside the vanilla for an extra nutty aroma.

Chocolate Lover’s Dream

Who says breakfast can’t have chocolate? Stir a handful of chocolate chips or chopped dark chocolate into the brioche cubes before pouring the custard. It melts into gooey pockets of pure bliss, making this a truly decadent morning treat.

What to Serve With High Protein Brioche French Toast Casserole

This beautiful High Protein Brioche French Toast Casserole is certainly a star on its own, but a few thoughtful accompaniments can elevate it to an unforgettable feast! I love creating a little spread that offers balance and extra delight.

For a touch of freshness, I always have a bowl of vibrant fresh berries on the side – think raspberries, blueberries, and sliced strawberries. A dollop of creamy Greek yogurt adds a lovely tangy contrast and an extra protein boost, which I find really brightens the whole dish. For an extra special touch, my mom always insists on a warm drizzle of homemade caramel sauce or a sprinkle of powdered sugar just before serving. And of course, a steaming mug of coffee or a glass of cold milk makes it a truly complete and comforting experience.

How to Store High Protein Brioche French Toast Casserole

After all the joy of baking and sharing, it’s wonderful to know you can savor this High Protein Brioche French Toast Casserole for another day! Proper storage ensures those precious leftovers remain just as delicious.

Fridge Storage

Once cooled completely, cover the casserole dish tightly with plastic wrap or aluminum foil, or transfer individual portions to airtight containers. It will keep beautifully in the refrigerator for up to 3-4 days.

Reheating for Freshness

When you’re ready for more, simply reheat individual servings in the microwave until warm, or pop the whole dish back into a preheated oven (around 350°F or 175°C) until heated through. My personal tip? A light dusting of powdered sugar after reheating brings it back to life, making it feel fresh and fancy all over again!

Nutritional Benefits

This High Protein Brioche French Toast Casserole offers a satisfying start. Packed with protein from eggs and vanilla protein powder, it helps keep you energized. Wholesome milk and nuts add to its nourishing profile. It’s a treat both indulgent and surprisingly wholesome, combining comfort with simple, good ingredients.

FAQs

Faq 1

Can I use regular bread instead of brioche?
While brioche gives this casserole its signature rich, tender texture, you can certainly use other sturdy breads like challah or even a good quality white bread. Just ensure it’s slightly stale to absorb the custard perfectly for your High Protein Brioche French Toast Casserole.

Faq 2

Can I prepare this casserole without letting it soak overnight?
You can, but for the best, most custardy results, I truly recommend the overnight soak. If you’re short on time, let it soak for at least 30 minutes at room temperature, ensuring the bread has time to absorb the liquid for your High Protein Brioche French Toast Casserole.

Faq 3

How do I know when the casserole is fully baked?
Your High Protein Brioche French Toast Casserole is ready when it’s golden brown on top, puffed up, and a knife inserted into the center comes out clean. The internal temperature should reach around 160°F (71°C) to ensure the eggs are fully cooked.

Faq 4

Can I make this dairy-free?
You can certainly adapt this High Protein Brioche French Toast Casserole! Simply swap out regular milk for your favorite non-dairy alternative like almond or oat milk, and ensure your brioche is also dairy-free. The flavor will still be wonderfully rich and comforting.

Conclusion

And there you have it, sweet friends! This High Protein Brioche French Toast Casserole is more than just a breakfast dish; it’s an invitation to create cherished memories around the table, just like those I’ve held dear since childhood. With its ease of preparation and comforting flavors, it’s a perfect reminder that joyful, home-baked desserts—or in this case, a breakfast so good it feels like dessert—are truly the sweetest way to bring people together. I wholeheartedly encourage you to give it a try and fill your home with its wonderful aroma!

Leave a comment

Recipe Rating