Dessert

Overnight Blueberry French Toast Casserole Recipe

ByHarper Ellington March 20, 2026March 20, 2026

Introduction

This Overnight Blueberry French Toast Casserole is a delicious and easy make-ahead breakfast perfect for busy mornings. Creamy, fruity, and wonderfully spiced, it combines soft French bread with a rich custard and fresh blueberries for a comforting start to your day.

A close-up image shows a thick slice of cake on a white plate, sitting on a white marbled surface. The cake has two main layers: the bottom layer is a soft, creamy yellow custard with a smooth texture, and the top layer is a golden-brown baked crust sprinkled lightly with powdered sugar. On top of the crust, there is a thick layer of dark purple blueberries that appear juicy and slightly glossy. The cake has one bite taken out, revealing the creamy inside and the rich blueberry topping. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

8 ounces softened cream cheese
1 cup powdered sugar
2 loaves cubed French bread
2 cups blueberries (divided)
2 cups milk
8 eggs
1 teaspoon cinnamon powder
½ teaspoon ground nutmeg
1 teaspoon vanilla extract (divided)

Instructions

Step 1: In a mixing bowl, blend the softened cream cheese with powdered sugar, 1 cup of milk, and half of the vanilla extract until the mixture is smooth and creamy.
Step 2: In another bowl, combine cubed French bread with half of the blueberries. Pour the cream cheese mixture over the bread and blueberries, then gently fold to combine. Transfer this mixture evenly into a greased baking dish.
Step 3: In a separate bowl, whisk together the remaining 1 cup of milk, eggs, cinnamon, nutmeg, and the remaining vanilla extract until fully incorporated. Pour this custard mixture evenly over the bread mixture in the baking dish.
Step 4: Sprinkle the remaining blueberries on top, cover the dish tightly with plastic wrap or foil, and refrigerate overnight to allow the flavors to meld and the bread to soak.
Step 5: The next morning, preheat your oven to 350°F (175°C). Remove the cover from the casserole and bake for about 75 minutes, or until the top is golden brown and the custard is set. Let it cool slightly before serving.

Tips & Variations

Use day-old French bread for better texture as it soaks up the custard without becoming too soggy.
Swap blueberries for other berries like raspberries or blackberries to change up the flavor.
Add a teaspoon of orange zest to the custard for a fresh citrus twist.
Serve with maple syrup or a dusting of powdered sugar for extra sweetness.

Storage

Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in the microwave or warm them in the oven at 350°F (175°C) until heated through. This casserole does not freeze well due to the custard texture.

How to Serve

A slice of blueberry cake is shown with a thick, golden-yellow soft cake base layered with a glossy dark blue layer of cooked blueberries on top, some spilling over the edges. The cake is sprinkled lightly with white powdered sugar that adds a soft texture on top of the berries. The slice sits on a simple white plate, which rests on a white marbled surface, and a woman's hand is holding a piece of the cake on the side. The lighting highlights the moist texture of the cake and the shiny berries. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I prepare this casserole without cream cheese?

Yes, you can omit the cream cheese, but it adds a lovely richness and tang. If skipping it, consider increasing the eggs by 2 and adding a bit more cinnamon or vanilla for flavor.

Is it possible to make this gluten-free?

Absolutely! Substitute the French bread with your favorite gluten-free bread. Just make sure it is sturdy enough to hold the custard without falling apart.