Overnight Brown Sugar French Toast Casserole: A Cozy Breakfast Delight
Waking up to the comforting aroma of cinnamon, vanilla, and caramelized brown sugar is one of life’s simplest pleasures. Overnight Brown Sugar French Toast Casserole transforms the classic breakfast favorite into an effortless, crowd-pleasing dish that practically prepares itself while you sleep. Perfect for busy mornings, holiday brunches, or lazy weekend gatherings, this casserole combines soft, custardy bread with a rich brown sugar topping that caramelizes to golden perfection. Each bite melts in your mouth, balancing sweetness with a hint of warm spices, leaving everyone reaching for seconds. Beyond its decadent flavor, the ease of preparation makes it a go-to recipe for anyone looking to impress without spending hours in the kitchen.
The best part? You can prep the night before, refrigerate it, and wake up to a breakfast that’s ready to bake—saving precious morning time while still delivering a homemade feel. Whether it’s for a festive occasion or a simple family breakfast, this Overnight Brown Sugar French Toast Casserole is a surefire way to start the day on a delicious note.

Ingredients Needed
Below is a detailed list of ingredients with their approximate calorie counts to help you plan your meal:
| Ingredient | Quantity | Calories (Approx.) |
|---|---|---|
| Brioche or Challah Bread | 1 loaf (about 12 slices) | 1,200 |
| Eggs | 6 large | 420 |
| Whole Milk | 2 cups | 300 |
| Heavy Cream | ½ cup | 400 |
| Brown Sugar | ½ cup | 420 |
| Granulated Sugar | 2 tbsp | 100 |
| Vanilla Extract | 2 tsp | 24 |
| Ground Cinnamon | 1 tsp | 6 |
| Nutmeg (optional) | ¼ tsp | 3 |
| Butter | 4 tbsp | 400 |
| Maple Syrup (for serving) | Optional | 52 per tbsp |
Step-by-Step Cooking Instructions
- Prepare the Bread
Slice the brioche or challah into thick, even slices. Arrange the slices in a greased 9×13-inch baking dish, slightly overlapping if necessary. - Make the Custard Mixture
In a large bowl, whisk together eggs, milk, heavy cream, vanilla extract, brown sugar, granulated sugar, cinnamon, and nutmeg until smooth and well combined. - Soak the Bread
Pour the custard mixture evenly over the bread slices. Press down lightly to ensure all pieces absorb the liquid. Cover the dish with plastic wrap and refrigerate overnight (or at least 6 hours). - Preheat and Prepare to Bake
The next morning, preheat your oven to 350°F (175°C). Remove the casserole from the fridge and let it sit for 10–15 minutes to reach room temperature. - Add the Butter Topping
Cut the butter into small pieces and scatter it evenly over the top of the soaked bread. - Bake the Casserole
Bake uncovered for 45–55 minutes or until the top is golden brown and the custard is fully set. A toothpick inserted into the center should come out clean. - Serve Warm
Let the casserole cool for 5–10 minutes before slicing. Drizzle with maple syrup or a dusting of powdered sugar if desired.

Tips for Customizing the Recipe
- Bread Choices: Brioche, challah, or even a sturdy French bread work beautifully. For a healthier twist, try whole-grain or multigrain bread.
- Flavor Enhancements: Add orange zest, cardamom, or a splash of bourbon to the custard for a gourmet touch.
- Nutty Crunch: Sprinkle chopped pecans, walnuts, or almonds over the top before baking for added texture.
- Fruit Additions: Layer fresh or frozen berries, sliced bananas, or diced apples between the bread layers for extra flavor.
- Sugar Alternatives: Use coconut sugar, maple sugar, or honey in place of brown sugar to tweak sweetness.
Nutritional Information (Per Serving, Serves 8)
| Nutrient | Amount (Approx.) |
|---|---|
| Calories | 330 kcal |
| Protein | 9 g |
| Carbohydrates | 40 g |
| Sugars | 22 g |
| Fat | 15 g |
| Saturated Fat | 8 g |
| Fiber | 1 g |
| Sodium | 180 mg |
Serving Suggestions
Overnight Brown Sugar French Toast Casserole pairs wonderfully with:
- Fresh fruit like strawberries, blueberries, or sliced bananas
- A drizzle of warm maple syrup or honey
- A dollop of whipped cream or mascarpone cheese
- A side of crispy bacon or breakfast sausage for a savory contrast
- Hot coffee, spiced chai, or freshly squeezed orange juice
Serving it with a mix of sweet and savory elements makes it perfect for brunch spreads or holiday gatherings.
Overnight Brown Sugar French Toast Casserole: A Cozy Breakfast Delight
8
servings15
minutes45
minutes330
kcalIngredients
IngredienttQuantity
Brioche or Challah Breadt1 loaf (12 slices)
Eggst6 large
Whole Milkt2 cups
Heavy Creamt½ cup
Brown Sugart½ cup
Granulated Sugart2 tbsp
Vanilla Extractt2 tsp
Ground Cinnamont1 tsp
Nutmeg (optional)t¼ tsp
Buttert4 tbsp
Maple Syrup (for serving)tOptional
Directions
- Prepare the Bread: Slice bread and arrange in a greased 9×13-inch baking dish.
- Make Custard: Whisk together eggs, milk, heavy cream, brown sugar, granulated sugar, vanilla, cinnamon, and nutmeg.
- Soak Bread: Pour custard over bread. Press lightly to absorb. Cover and refrigerate overnight (6–12 hours).
- Preheat Oven: Remove casserole from fridge 10–15 minutes before baking. Preheat oven to 350°F (175°C).
- Add Butter: Dot the top with butter pieces.
- Bake: Bake uncovered for 45–55 minutes until golden and custard is set.
- Serve: Cool slightly. Serve warm with maple syrup or powdered sugar.
Recipe Video
Notes
- Bread Choice Matters: Brioche and challah are ideal for a soft, custardy texture. Avoid very thin or stale bread that won’t absorb the custard well.
Overnight Soak: For the best flavor and texture, let the bread soak in the custard for at least 6 hours or overnight. This ensures a rich, custardy interior.
FAQs
1. Can I make this casserole gluten-free?
Yes! Simply use gluten-free bread instead of regular brioche or challah. Make sure the bread is sturdy enough to absorb the custard without falling apart. Many gluten-free brioche or sandwich-style breads work perfectly.
2. How long can I store leftovers?
Store leftovers in an airtight container in the refrigerator for up to 3–4 days. To reheat, place individual slices in the microwave for 30–60 seconds or warm them in a preheated oven at 325°F (160°C) until heated through.
3. Can I freeze the casserole?
Absolutely. After baking, allow the casserole to cool completely, then wrap it tightly in foil or plastic wrap and freeze for up to 2 months. Reheat in the oven at 350°F (175°C) until warmed through. You can also freeze it unbaked after soaking the bread, but bake directly from frozen, adding extra 10–15 minutes to the baking time.
4. What type of bread is best for this casserole?
Brioche or challah bread is ideal because they are soft, slightly sweet, and absorb the custard well without getting soggy. You can also experiment with French bread, whole-grain bread, or even cinnamon swirl bread for added flavor.
5. Can I make it dairy-free?
Yes! Substitute whole milk with almond, oat, or soy milk, and replace heavy cream with coconut cream or any plant-based cream. Use dairy-free butter or margarine for the topping. The texture will remain rich and custardy.
Conclusion
Overnight Brown Sugar French Toast Casserole is the ultimate breakfast indulgence—rich, flavorful, and incredibly easy to prepare. Its overnight preparation means you wake up to a golden, caramelized dish ready to bake, freeing up time for other morning activities or leisurely moments. Customizable, crowd-pleasing, and full of comforting flavors, this casserole will quickly become a staple in your breakfast rotation. Perfect for family breakfasts, holiday brunches, or special occasions, it’s more than just French toast—it’s a heartwarming start to any day.
