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Blueberry French Toast Casserole with Vanilla Glaze

A delicious and easy breakfast casserole made with fluffy bread, sweet blueberries, and a rich vanilla glaze. Perfect for brunch or cozy weekends.
Prep Time 3 hours
Cook Time 1 hour
Total Time 4 hours
Course Breakfast, Brunch
Cuisine American
Servings 8 pieces
Calories 300 kcal

Ingredients
  

Casserole Ingredients

  • 5 large eggs
  • 1 cup milk (any choice; dairy or non-dairy)
  • 1/4 cup melted salted butter (DF option: Use ghee or melted coconut oil) Dairy-free option available.
  • 1/4 cup pure maple syrup (plus more for serving, optional)
  • 2 teaspoons pure vanilla extract
  • 1 loaf (10-ounce) sourdough bread (GF option: Use gluten-free bread) Gluten-free option available.
  • 1 1/2 cups fresh or frozen blueberries Do not thaw frozen blueberries.
  • 1 tablespoon milk (your choice)
  • 1/2 teaspoon pure vanilla extract

Glaze Ingredients

  • 1/2 cup powdered sugar

Instructions
 

Preparation

  • In a large bowl, whisk together the eggs, milk, melted butter, maple syrup, and vanilla extract until well combined.
  • Spray an 8×8-inch casserole dish with cooking spray.
  • Add the bread cubes and 1 cup of blueberries to the dish (reserve 1/2 cup).
  • Pour the egg mixture evenly over the bread and blueberries, tossing gently to ensure every piece of bread is moist.
  • Spread the remaining ½ cup of blueberries on top.
  • Cover and refrigerate for at least 3 hours or up to 24 hours if you’re not freezing it.

Baking

  • Preheat your oven to 350°F while letting the casserole warm at room temperature.
  • Bake uncovered for 50-60 minutes, or until it is golden brown on top and set in the middle. If it browns too much, tent with foil.

Making the Glaze

  • For the Vanilla Glaze, mix 1 tablespoon of milk, 1/2 teaspoon of vanilla extract, and a pinch of salt in a small bowl.
  • Add in the powdered sugar and whisk until smooth.

Serving

  • Allow the casserole to cool for about 10 minutes and then drizzle the glaze over the top, serving warm with additional maple syrup if desired.

Notes

For added texture, mix in some chopped nuts or a sprinkle of cinnamon. If using frozen blueberries, do not thaw them before mixing; they will bake perfectly straight from the freezer. Allowing the casserole to chill overnight deepens the flavors.
Keyword blueberry, Breakfast Casserole, Easy Breakfast, French Toast Casserole, Vanilla Glaze