Overnight French toast casserole is a delicious and easy make-ahead breakfast! This baked challah French toast casserole is full of flavor, with no messy skillet or griddle to clean.
In a small saucepan, over medium heat, combine butter, brown sugar, and 1/2 teaspoon of cinnamon. Bring to a boil. Cook until butter and sugar no longer separate, about 7 minutes. Pour into prepared baking dish.
Sprinkle bread cubes over brown sugar mixture in an even layer.
In a large mixing bowl, whisk together eggs, milk, vanilla, 1/2 teaspoon cinnamon, nutmeg, and salt.
Pour egg mixture over bread, pressing down slightly if needed to saturate all the bread with the egg mixture.
Cover tightly and refrigerate overnight.
When ready to bake, remove plastic wrap/cover and place cold pan in cold oven. Preheat oven to 375ºF.
Bake for 55 minutes or until browned, bubbling, and no longer liquidy in the middle. A butter knife inserted near the center should come out clean, not coated with egg/milk mixture.
Video
Notes
Other types of bread can be substituted.
Can be made up to 24 hours in advance before baking.