Overnight Blueberry French Toast Casserole Recipe

French bread: This is the base of the casserole, giving it a soft yet slightly chewy texture when baked.

Blueberries: Fresh or frozen, they add a juicy, sweet-tart flavor that brightens the dish.

Eggs: Eggs help bind everything together and create the custardy texture.

Milk: Milk adds moisture and helps make the casserole creamy.

Heavy cream: This makes the dish richer and more indulgent.

Sugar: Adds sweetness to balance the tartness of the blueberries.

Vanilla extract: Gives a warm, sweet aroma and enhances the overall flavor.

Salt: Just a pinch to bring out all the flavors.

One of the most important steps in this Overnight Blueberry French Toast Casserole Recipe is whisking the eggs, milk, heavy cream, sugar, vanilla extract, and salt together. Getting this right helps make sure the custard is smooth and coats the bread cubes evenly, so every bite is creamy and delicious. Here’s how you can do it without making a mess:

1. Crack the eggs into a large mixing bowl first. This way, if you get a shell in there, it’s easier to fish out.
2. Add the milk, heavy cream, sugar, vanilla extract, and salt right on top.
3. Use a whisk and start slowly, stirring gently in a circular motion to combine everything.
4. Once the ingredients start to come together, you can whisk a little faster to make the mixture smooth and slightly frothy.
5. If you notice any lumps of sugar or bits of egg white, keep whisking until everything looks uniform.

Whisking like this makes the egg mixture silky and helps it soak into the bread cubes better overnight. When you bake it, the casserole will puff up nicely and have a soft, custardy texture instead of being dry or uneven.

I remember the first time I tried this, I whisked too fast right away, and the mixture splattered everywhere—definitely not fun to clean up! Now, I always start slow and build up speed, which keeps the kitchen tidy and the mixture perfect. Also, if you don’t have a whisk, a fork works fine, just takes a bit more time. Either way, taking a little extra care here really pays off when you dig into that golden-brown, blueberry-filled French toast the next morning.

• french bread - Substitute with brioche: Brioche is rich and buttery, providing a similar texture and flavor profile to french bread in a casserole.

• french bread - Substitute with challah: Challah is slightly sweet and soft, making it a great alternative for soaking up the custard mixture.

• blueberries - Substitute with raspberries: Raspberries offer a tart contrast and similar burst of flavor, complementing the sweetness of the casserole.

• blueberries - Substitute with blackberries: Blackberries provide a juicy and slightly tart flavor, similar to blueberries, and work well in a baked dish.

• eggs - Substitute with flaxseed meal: Mix 1 tablespoon of flaxseed meal with 2.5 tablespoons of water per egg. This acts as a binding agent in the casserole.

• eggs - Substitute with silken tofu: Use ¼ cup of blended silken tofu per egg for a similar texture and protein content in the casserole.

• milk - Substitute with almond milk: Almond milk provides a similar liquid base with a slightly nutty flavor, suitable for those avoiding dairy.

• milk - Substitute with oat milk: Oat milk has a creamy texture and neutral flavor, making it a good dairy-free alternative in the casserole.

• heavy cream - Substitute with coconut cream: Coconut cream adds richness and a slight coconut flavor, suitable for a dairy-free option.

• heavy cream - Substitute with cashew cream: Cashew cream is rich and creamy, providing a similar texture to heavy cream in the casserole.

• sugar - Substitute with maple syrup: Maple syrup adds a natural sweetness and depth of flavor, complementing the casserole.

• sugar - Substitute with honey: Honey provides a natural sweetness and a slightly floral note, enhancing the flavor of the casserole.

• vanilla extract - Substitute with almond extract: Almond extract offers a nutty and aromatic flavor, adding a unique twist to the casserole.

• vanilla extract - Substitute with maple extract: Maple extract provides a warm and sweet flavor, complementing the other ingredients in the casserole.

• salt - Substitute with sea salt: Sea salt provides a similar level of saltiness with a slightly different mineral profile, enhancing the flavors in the casserole.

• salt - Substitute with kosher salt: Kosher salt has a coarser texture and dissolves easily, providing a balanced saltiness in the casserole.

• Allow the casserole to cool completely after baking. This ensures that any residual heat doesn't create unwanted condensation, which can lead to sogginess.

• For short-term storage, cover the casserole tightly with plastic wrap or transfer it to an airtight container. Store it in the refrigerator for up to 3-4 days. This keeps the blueberries fresh and the bread from drying out.

• If you plan to enjoy the casserole later, freezing is a fantastic option. Slice the casserole into individual portions for easy reheating. Wrap each portion in plastic wrap, then in aluminum foil to prevent freezer burn.

• Place the wrapped portions in a freezer-safe bag or container, labeling it with the date. This helps you keep track of freshness. The casserole can be frozen for up to 2 months.

• When you're ready to indulge, thaw the casserole in the refrigerator overnight. This gradual thawing preserves the texture and flavor of the blueberries and bread.

• To reheat, preheat your oven to 350°F (175°C). Remove the plastic wrap and foil, then place the casserole on a baking sheet. Cover it loosely with foil to prevent over-browning and bake for 15-20 minutes or until heated through.

• For a quicker option, use the microwave. Place a portion on a microwave-safe plate, cover with a damp paper towel, and heat on medium power in 30-second intervals until warm. This method is perfect for busy mornings when you crave a quick breakfast treat.

• Enhance the reheated casserole with a drizzle of maple syrup or a dusting of powdered sugar for an extra touch of sweetness.

• Preheat your oven to 350°F (175°C). Place the leftover casserole in an oven-safe dish, cover it with aluminum foil to prevent it from drying out, and bake for about 20-25 minutes until it's heated through and the blueberries are juicy and warm.

• For a quicker method, use the microwave. Place a portion of the casserole on a microwave-safe plate. Cover it with a microwave-safe lid or another plate to retain moisture. Heat on medium power for 1-2 minutes, checking to ensure it's warmed evenly.

• If you prefer a crispy top, try reheating in a toaster oven. Set it to 350°F (175°C) and place a slice of the casserole on a baking sheet. Toast for about 10-15 minutes until the top is golden and the inside is warm.

• For an extra indulgent twist, reheat the casserole on the stovetop. Melt a small amount of butter in a non-stick skillet over medium heat. Add a slice of the casserole and cook for about 3-4 minutes on each side until it's heated through and has a slightly crispy exterior.

• If you have an air fryer, set it to 350°F (175°C) and place a slice of the casserole in the basket. Heat for about 5-7 minutes, which will give you a warm inside and a delightfully crispy top.

• Baking dish: A large, deep dish used to hold the bread cubes and blueberries, allowing them to soak up the egg mixture and bake evenly.

• Mixing bowl: A bowl used to whisk together the eggs, milk, heavy cream, sugar, vanilla extract, and salt, ensuring a smooth and well-combined mixture.

• Whisk: A tool used to blend the egg mixture thoroughly, incorporating air and ensuring all ingredients are evenly mixed.

• Refrigerator: Used to store the casserole overnight, allowing the bread to absorb the egg mixture fully.

• Oven: An appliance used to bake the casserole at a consistent temperature, ensuring it cooks evenly and achieves a golden brown finish.

• Measuring cups: Tools used to measure the precise amounts of milk, heavy cream, and sugar needed for the recipe.

• Measuring spoons: Tools used to measure the vanilla extract and salt accurately.

• Knife: Used to cut the loaf of French bread into cubes, ensuring they are the right size for the casserole.

• Cutting board: A surface used to safely and efficiently cut the bread into cubes.

Pre-cut the bread: Cut the french bread into cubes ahead of time and store them in an airtight container to save time when assembling the casserole.

Mix the night before: Prepare the egg mixture the night before and store it in the fridge. This way, you can quickly pour it over the bread cubes and blueberries in the morning.

Use frozen blueberries: Opt for frozen blueberries to eliminate washing and drying steps, making the process faster.

Pre-grease the dish: Grease the baking dish the night before to streamline the morning assembly.