This overnight baked French toast casserole is the perfect Christmas morning breakfast. Prep it the night before, then bake it in the morning for a warm, caramelized, and custard-like dish that feeds a crowd with minimal effort.
Use day-old bread for best texture. Overnight resting is crucial for proper custard absorption. For a dairy-free version, use unsweetened almond milk and coconut cream. For gluten-free, use gluten-free bread and a 1:1 gluten-free flour blend. Leftovers can be stored in the refrigerator for up to 3 days or frozen for up to 3 months.
Keywords: baked French toast casserole, Christmas breakfast, overnight French toast, holiday brunch, easy breakfast casserole