Why You’ll Love This Recipe

• Perfect make-ahead breakfast
• Soft, custardy center with a golden, crisp topping
• Bursting with juicy blueberries and fresh lemon flavor
• Great for holidays, brunches, and family gatherings
• Easy to prepare with simple ingredients
• Feeds a crowd with minimal effort
• Delicious served warm with maple syrup or lemon glaze

Prep Time

• Prep Time: 20 minutes
• Chill Time: 4 hours or overnight
• Cook Time: 50 minutes
• Total Time: About 5 hours 10 minutes

Servings: 8

Ingredients

For the French Toast

• 1 loaf (14–16 ounces) brioche or challah bread, cut into 1-inch cubes
• 2 cups fresh blueberries (or frozen, not thawed)
• 8 large eggs
• 2 cups whole milk
• ½ cup heavy cream
• ⅓ cup granulated sugar
• ¼ cup light brown sugar
• 2 teaspoons vanilla extract
• 1 tablespoon fresh lemon zest
• 2 tablespoons fresh lemon juice
• 1 teaspoon ground cinnamon
• ¼ teaspoon salt

Optional Lemon Glaze

• 1 cup powdered sugar
• 2–3 tablespoons fresh lemon juice
• ½ teaspoon lemon zest

Optional Toppings

• Maple syrup
• Powdered sugar
• Fresh blueberries
• Whipped cream
• Thin lemon slices
• Fresh mint leaves

Equipment Needed

• 9×13-inch baking dish
• Large mixing bowl
• Whisk
• Measuring cups and spoons
• Rubber spatula
• Zester or fine grater
• Bread knife

Instructions

Step 1: Prepare the Baking Dish

Lightly grease a 9×13-inch baking dish with butter or nonstick cooking spray.

Step 2: Layer the Bread and Blueberries

Arrange half of the bread cubes evenly in the prepared baking dish. Scatter half of the blueberries over the bread. Add the remaining bread cubes and finish with the remaining blueberries.

Step 3: Prepare the Custard

In a large bowl, whisk together the eggs, milk, heavy cream, granulated sugar, brown sugar, vanilla extract, lemon zest, lemon juice, cinnamon, and salt until smooth.

Step 4: Assemble the Casserole

Slowly pour the custard mixture evenly over the bread, making sure every piece is coated. Gently press the bread into the liquid with a spatula so it absorbs the custard.

Step 5: Chill

Cover the baking dish tightly with plastic wrap or aluminum foil and refrigerate for at least 4 hours or overnight. This allows the bread to soak up all of the custard for the best texture.

Step 6: Bake

Preheat the oven to 350°F (175°C).

Remove the casserole from the refrigerator and let it stand at room temperature for about 20 minutes.

Bake uncovered for 45–50 minutes, or until the top is golden brown and the center is fully set but still moist.

If the top begins browning too quickly, loosely cover it with foil during the last 10–15 minutes of baking.

Step 7: Prepare the Lemon Glaze (Optional)

In a small bowl, whisk together the powdered sugar, lemon juice, and lemon zest until smooth. Adjust the consistency with a little more lemon juice if needed.

Step 8: Serve

Allow the casserole to cool for 5–10 minutes before serving. Drizzle with the lemon glaze or warm maple syrup and garnish with fresh blueberries, powdered sugar, whipped cream, or fresh mint.

Tips for the Best Baked Blueberry Lemon French Toast

• Slightly stale brioche or challah absorbs the custard without becoming soggy.
• Refrigerating overnight gives the casserole the best flavor and texture.
• Fresh lemon zest provides a brighter flavor than bottled lemon juice alone.
• Use frozen blueberries straight from the freezer to prevent excess moisture.
• Avoid overbaking to keep the center soft and custardy.
• Let the casserole rest briefly before slicing for cleaner servings.

Variations

Cream Cheese Blueberry French Toast

Add cubes of cream cheese between the bread layers for a creamy, cheesecake-inspired filling.

Mixed Berry French Toast

Replace some of the blueberries with raspberries, strawberries, or blackberries.

Cinnamon Streusel French Toast

Top with a buttery streusel made from flour, brown sugar, butter, and cinnamon before baking.

Lemon Poppy Seed French Toast

Add 1 tablespoon of poppy seeds to the custard for extra texture and flavor.

Peach Blueberry French Toast

Layer sliced peaches with the blueberries for a fresh summer twist.

Nutty French Toast

Sprinkle chopped pecans, walnuts, or sliced almonds over the top before baking for added crunch.

Make-Ahead Instructions

This casserole is ideal for preparing ahead. Assemble everything up to 24 hours before baking, cover tightly, and refrigerate overnight. Bake fresh the next morning, adding a few extra minutes if needed.

Storage

Store leftover French toast in an airtight container in the refrigerator for up to 4 days.

Reheat individual portions in the microwave for 30–60 seconds or warm the casserole in a 325°F (163°C) oven until heated through.

Freeze cooled portions in freezer-safe containers for up to 2 months. Thaw overnight in the refrigerator before reheating.

What to Serve with Baked Blueberry Lemon French Toast

This breakfast casserole pairs wonderfully with:

• Crispy bacon
• Breakfast sausage
• Scrambled eggs
• Fresh fruit salad
• Greek yogurt
• Hash browns
• Maple syrup
• Whipped cream
• Vanilla yogurt
• Fresh orange juice
• Coffee or hot tea

Final Thoughts

Baked Blueberry Lemon French Toast is a comforting breakfast casserole that’s perfect for any special occasion or leisurely weekend morning. The combination of buttery bread, juicy blueberries, fragrant lemon, and rich vanilla custard creates a dish that’s both elegant and easy to make. Whether topped with maple syrup, a tangy lemon glaze, or simply a dusting of powdered sugar, this make-ahead recipe is guaranteed to become a family favorite.