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Overnight Blueberry French Toast Casserole


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  • Author: Mia
  • Total Time: 1 hour 5 minutes
  • Yield: 8 servings
  • Diet: Vegetarian

Description

A cozy and comforting breakfast bake made with layers of fluffy bread, juicy blueberries, and a sweet, custard-like filling — perfect for prepping the night before and baking fresh in the morning.


Ingredients

  • 1 loaf (about 14 oz) day-old French bread, cut into 1-inch cubes
  • 1 1/2 cups fresh or frozen blueberries
  • 8 large eggs
  • 2 1/2 cups milk (dairy or non-dairy)
  • 1/2 cup maple syrup or honey
  • 1 tsp vanilla extract
  • 1/2 tsp ground cinnamon
  • 1/4 tsp salt
  • Topping (optional):
  • 1/2 cup all-purpose flour
  • 1/2 cup brown sugar
  • 1 tsp cinnamon
  • 1/4 cup butter or coconut oil, chilled and cut into pieces

Instructions

  1. Lightly grease a 9×13-inch baking dish. Spread half of the cubed bread into the dish, then sprinkle with half of the blueberries. Repeat with the remaining bread and blueberries.
  2. In a large mixing bowl, whisk together eggs, milk, maple syrup, vanilla, cinnamon, and salt. Pour the mixture evenly over the bread layers.
  3. Cover the dish with foil and refrigerate overnight or for at least 6 hours.
  4. If using the topping, mix the flour, brown sugar, and cinnamon in a small bowl. Cut in the butter or coconut oil until the mixture resembles coarse crumbs. Cover and refrigerate overnight.
  5. When ready to bake, preheat the oven to 350°F (175°C). Remove the casserole from the fridge and sprinkle the topping evenly over the surface if using.
  6. Bake uncovered for 45–55 minutes, or until the top is golden brown and the center is set.
  7. Let the casserole rest for 5–10 minutes before serving.

Notes

  • You can use dairy-free milk and coconut oil for a dairy-free version.
  • Frozen blueberries do not need to be thawed before using.
  • Best made with day-old or slightly stale bread for better texture.
  • Great for meal prep and holiday mornings.
  • Prep Time: 15 minutes
  • Cook Time: 50 minutes
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 310
  • Sugar: 15g
  • Sodium: 280mg
  • Fat: 12g
  • Saturated Fat: 5g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 40g
  • Fiber: 2g
  • Protein: 10g
  • Cholesterol: 155mg