This Overnight Blueberry French Toast Casserole is the kind of brunch recipe that makes mornings feel effortless. You prep everything the night before, let the bread soak up a sweet vanilla-cinnamon custard, then bake it in the morning until golden and cozy. The blueberry pockets turn jammy, and the buttery streusel topping adds the perfect crunch. It’s a crowd-pleaser for holidays, weekend brunch, and meal prep breakfasts—no standing at the stove flipping slices. If you love easy overnight French toast casserole recipes and want something that looks impressive with almost zero morning work, this blueberry version is the one.
table of contents
Time Breakdown
- Prep Time: 25 minutes
- Chill Time: 3–24 hours (overnight best)
- Bake Time: 45–55 minutes
- Total Time: 1 hour 15 minutes + overnight
- Servings: 12
Ingredients List
Casserole
- 1 loaf crusty bread (12–14 oz): French bread, sourdough, brioche, or challah, cubed
- 1 cup blueberries (fresh or frozen)
- 8 large eggs
- 2¼ cups whole milk
- ¾ cup packed light brown sugar
- 1 tbsp vanilla extract
- ½ tsp ground cinnamon
Streusel Topping
- ⅓ cup packed brown sugar
- ⅓ cup all-purpose flour
- ½ tsp ground cinnamon
- 6 tbsp unsalted butter, cold and cubed
Optional for Serving
- Extra blueberries, maple syrup, powdered sugar
Kitchen Tools You’ll Need
This recipe doesn’t require fancy gadgets, just a few reliable kitchen basics to keep everything simple and stress-free.
- 9×13-inch baking dish
- Mixing bowls
- Whisk
- Measuring cups & spoons
- Knife + cutting board
- Pastry cutter (or 2 forks)
- Plastic wrap or foil
Step-by-Step Beginner-Friendly Instructions
- Prep the pan: Grease a 9×13-inch baking dish with butter or spray.
- Cube the bread: Cut bread into 1-inch cubes and spread evenly in the pan.
- Add berries: Scatter blueberries over the bread. 🫐
- Make custard: Whisk eggs, milk, brown sugar, vanilla, and cinnamon until smooth (no sugar lumps).
- Soak overnight: Pour custard evenly over bread. Press bread down gently so it absorbs. Cover tightly and refrigerate 3–24 hours (overnight is best).
- Heat oven: Preheat to 350°F (177°C). Remove pan from fridge while oven heats.
- Make streusel: In a bowl, whisk brown sugar, flour, and cinnamon. Cut in cold butter until crumbly (pea-sized bits).
- Top + bake: Sprinkle streusel evenly over casserole. Bake 45–55 minutes until golden and set in the center.
- Serve: Rest 5–10 minutes, then serve warm with syrup or powdered sugar. 😊
Pro Tips
- Bread tip: Day-old bread soaks better. To “stale” fast, toast cubes at 300°F for 10 minutes.
- Frozen berries: Use straight from frozen (no need to thaw).
- Softer vs crispier: Bake 45 minutes for softer custard, 55 minutes for firmer set + crunchier top.
- Make-ahead topping: Mix streusel and refrigerate separately, then sprinkle right before baking.
Nutrition Table
| Serving Size | Calories | Protein | Carbs | Fat | Fiber | Sugar |
|---|---|---|---|---|---|---|
| 1 plate | 410 | 11g | 55g | 16g | 2g | 24g |
Disclaimer: Nutrition facts are estimated using online tools and may vary based on your ingredients and preparation. Please consult a nutritionist for precise dietary advice.
Overnight Blueberry French Toast Casserole
Ingredients
Equipment
Method
- Grease a 9×13-inch baking dish. Add bread cubes and scatter blueberries on top.
- Whisk eggs, milk, brown sugar, vanilla, and cinnamon until smooth. Pour evenly over bread. Press down gently.
- Cover tightly and refrigerate 3–24 hours (overnight best).
- Preheat oven to 350°F (177°C). Remove pan from fridge.
- Make streusel: mix brown sugar, flour, and cinnamon. Cut in cold butter until crumbly.
- Sprinkle streusel over casserole. Bake 45–55 minutes until golden and set.
- Rest 5–10 minutes. Serve warm with syrup or powdered sugar.
Nutrition
Notes
Tried this recipe?
Let us know how it was!Conclusion
This Overnight Blueberry French Toast Casserole is the easiest way to serve a “wow” brunch—prep tonight, bake tomorrow, and enjoy golden streusel, jammy blueberries, and cozy vanilla-cinnamon flavor.