Overnight Blueberry Lemon Stuffed French Toast Bake

Why You’ll Love This Recipe

• All the luxury of stuffed French toast without standing at the stove—your oven does the work.
• Lemon-kissed cream cheese balances sweet blueberries for bright, bakery-style flavor.
• Overnight soak means stress-free mornings and custardy, tender centers.
• Golden, sugared top adds a gentle crunch to every slice.

Grocery List

• Produce: 2 lemons, 2 cups blueberries
• Dairy: Cream cheese, whole milk, heavy cream, unsalted butter, large eggs
• Pantry: Brioche or challah loaf, granulated sugar, turbinado sugar, powdered sugar, pure maple syrup, vanilla extract, ground cinnamon, fine salt

Full Ingredients

For the casserole

• 1 lb brioche or challah, cut into 1-inch thick slices (about 12 slices)
• 2 cups blueberries (fresh or frozen; if frozen, do not thaw)

Lemon cream cheese filling

• 8 oz cream cheese, softened
• 1/3 cup granulated sugar
• 2 tsp finely grated lemon zest (from about 2 lemons)
• 2 tbsp fresh lemon juice
• 1 tsp vanilla extract
• Pinch fine sea salt

Custard

• 6 large eggs
• 2 1/2 cups whole milk
• 1/2 cup heavy cream
• 1/3 cup pure maple syrup
• 1 tsp vanilla extract
• 1/4 tsp ground cinnamon
• 1/4 tsp fine sea salt

To finish

• 1 tbsp unsalted butter, melted
• 2 tbsp turbinado sugar (or granulated)
• 2 tbsp powdered sugar, for dusting
• Warm maple syrup, for serving (optional)

Step-by-Step Instructions

Step 1: Prep the pan and bread

Butter a 9×13-inch baking dish. Slice the brioche or challah into 1-inch-thick slices. Arrange a snug single layer of bread in the bottom of the dish, cutting pieces as needed to fill gaps. Set remaining slices aside for the top layer.

Step 2: Make the lemon cream cheese

In a medium bowl, beat the cream cheese, granulated sugar, lemon zest, lemon juice, vanilla, and a pinch of salt until completely smooth and spreadable, about 1–2 minutes. If your cream cheese is very soft, you can whisk by hand; otherwise use a hand mixer on medium speed.

Step 3: Build the layers

Spread half of the lemon cream cheese over the bottom bread layer. Scatter 1 cup of blueberries over the cream cheese. Top with the remaining bread slices to form a second layer, then spread the remaining cream cheese over the top and scatter the remaining 1 cup blueberries. If using frozen blueberries, add them straight from the freezer; do not thaw (this limits color bleeding). Gently press the top layer to level.

Step 4: Whisk the custard

In a large bowl, whisk the eggs, milk, heavy cream, maple syrup, vanilla, cinnamon, and salt until fully combined and no streaks of egg remain. Slowly pour the custard evenly over the casserole, pausing to let it soak down into the bread. Use the back of a spoon or your palm to press the top gently so everything is moistened.

Step 5: Chill overnight

Cover the dish tightly with foil or a lid and refrigerate for at least 8 hours and up to 24 hours. This resting time allows the bread to absorb the custard for a creamy, soufflé-like interior.

Step 6: Bake until puffed and golden

Preheat the oven to 350°F (175°C) with a rack in the center. Bake the casserole covered for 30 minutes. Carefully remove the foil, brush the top with the melted butter, sprinkle evenly with the turbinado sugar, and continue baking uncovered for 18–22 minutes more, until the center is just set (a knife inserted near the center should come out custard-damp but not liquid) and the top is golden and lightly crisp.

Step 7: Rest, garnish, and serve

Let the casserole rest 10 minutes to set. Dust with powdered sugar. Cut into 8 squares and serve warm with maple syrup. Add a little extra lemon zest over the top if you like a brighter citrus note.

Pro Tips

• Use day-old bread. Slightly stale brioche or challah absorbs custard better without turning mushy.
• Pour custard slowly and press gently so every piece of bread gets evenly soaked.
• Prevent over-browning: if the top darkens before the center sets, tent loosely with foil.
• For extra crunch, swap in demerara sugar or add 2 tbsp sliced almonds with the turbinado topping.
• Flavor boost: rub lemon zest into the granulated sugar before mixing to release fragrant oils.

Variations

• Mixed Berry: Replace half the blueberries with raspberries or blackberries.
• Orange-Ricotta: Swap lemon with orange zest/juice and whisk 1/2 cup ricotta into the cream cheese for a milder tang.
• Gluten-Free: Use your favorite sturdy gluten-free brioche-style loaf and reduce milk to 2 1/4 cups.

Storage & Make-Ahead

Assemble up to 24 hours ahead and keep covered in the refrigerator. Baked leftovers keep well, covered and refrigerated, for 3–4 days. Reheat individual portions in a 350°F (175°C) oven for 12–15 minutes or in the microwave in short bursts until warm. To freeze, cool completely, wrap slices tightly, and freeze up to 2 months; thaw overnight in the fridge and reheat as above.

Nutrition (per serving)

Approx. 520 calories; 25 g fat; 58 g carbohydrates; 14 g protein; 3 g fiber; 380 mg sodium. Calculated without powdered sugar dusting or additional maple syrup for serving. Values are estimates.