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Slice of French toast casserole on a plate with mixed berries and maple syrup with more berries and the casserole in the background.

Overnight Brioche French Toast Casserole

Alicia
This easy overnight brioche French toast casserole is the perfect way to get a hearty breakfast on the table with minimal effort!
5 from 47 votes
Prep Time 25 minutes
Cook Time 1 hour 15 minutes
Chill Time 8 hours
Total Time 9 hours 40 minutes
Course Breakfast
Servings 6 servings

Ingredients
  

  • 1 loaf (20-22 ounces) stale brioche bread cut into 1 inch cubes
  • 8 large eggs
  • 1 1/2 cups whole milk
  • 1 cup heavy cream
  • 3/4 cup brown sugar packed
  • 1 tablespoon ground cinnamon
  • 1 tablespoon vanilla extract
  • 1/4 teaspoon sea salt
  • powdered sugar

Instructions
 

  • To make stale brioche bread, either allow the cubes to sit out on the counter all day or place them on a baking sheet and bake at 300 degrees for 15 minutes stirring halfway through.
  • Grease a 9x13 inch baking dish with butter. Place half of the bread cubes in the dish.
  • Whisk together the eggs, milk, heavy cream, brown sugar, cinnamon, vanilla extract, and salt.
  • Pour half of the custard over the bread cubes. Then, add the other half of bread cubes and top with the rest of the custard. You can move the bread around a bit to cover everything, but avoid moving them too much or they'll break apart.
  • Cover the dish with aluminum foil and place it in the fridge to chill overnight. (See note #1)
  • In the morning, pull the casserole from the fridge to come to room temperature for 30 minutes.
  • Then, preheat the oven to 350 degrees F.
  • Bake covered for 45 minutes. Then, remove the foil and continue baking for another 30 minutes or until the top is golden brown and the center is set. Top with powdered sugar. (See note #2)

Notes

  1. While this dish is intended to sit overnight, you can make it and let it rest in the fridge for 4 hours, then proceed with baking.
  2. In addition to topping the baked French toast with powdered sugar, you can serve this with plenty of other items to round out the meal. Here are some suggestions:
    • Fresh berries
    • Cantaloupe
    • Maple Syrup
    • Hazelnut spread
    • Chocolate Syrup
    • Bacon
    • Sausage
    • Orange juice

Nutrition

Serving: 1servingCalories: 624kcalCarbohydrates: 59gProtein: 18gFat: 36gSaturated Fat: 20gPolyunsaturated Fat: 2gMonounsaturated Fat: 6gTrans Fat: 1gCholesterol: 397mgSodium: 492mgPotassium: 267mgFiber: 1gSugar: 31gVitamin A: 1531IUVitamin C: 1mgCalcium: 207mgIron: 2mg
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