1loafbrioche or challah breadday-old, cut into 1-inch thick slices
8largeeggs
2cupsheavy cream
1/2cupwhole milk
1/3cuppure maple syrupplus more for serving
2teaspoonsvanilla extractpure vanilla
1teaspoonground cinnamon
1tablespoonorange zestfreshly grated
1/2teaspoonsalt
4tablespoonsunsalted buttermelted
2tablespoonsbrown sugarfor sprinkling
powdered sugarfor dusting
Instructions
Grease a 9x13-inch baking dish with butter. Arrange the bread slices in the dish, overlapping slightly if needed to fit.
In a large bowl, whisk together eggs, heavy cream, milk, maple syrup, vanilla extract, cinnamon, orange zest, and salt until completely smooth with no streaks.
Pour the custard mixture evenly over the bread, pressing down gently to ensure all pieces are coated. Drizzle with melted butter and sprinkle with brown sugar.
Cover tightly with plastic wrap and refrigerate for at least 4 hours or overnight (preferred).
When ready to bake, preheat oven to 375°F. Remove plastic wrap from casserole.
Bake for 15 minutes at 375°F, then reduce temperature to 350°F and continue baking for 25-30 minutes until golden brown and center is set.
Let cool for 5 minutes, then dust with powdered sugar. Serve immediately with warm maple syrup and fresh berries if desired.
Notes
Storage: Refrigerate leftovers up to 4 days. Reheat individual portions in microwave or whole casserole in 300°F oven. Can be frozen before baking for up to 3 months—thaw overnight before baking.