This overnight French toast bake is the ultimate make-ahead brunch. Layers of challah, cream cheese, and blueberries soak in a rich custard, then bake with a buttery streusel topping for a comforting, crowd-pleasing dish.
Using day-old bread is crucial for the best texture. Do not skip the overnight chilling step, as it allows the bread to fully absorb the custard. For a dairy-light version, use almond milk and plant-based cream cheese. Leftovers reheat well in the microwave or oven.