This Easy Overnight French Toast Casserole Makes Mornings Effortless

Warm, buttery, and soaked with sweet custard, this French toast casserole brings all the comfort of a classic breakfast with none of the morning rush.

It’s simple to assemble the night before, letting the bread absorb every bit of flavor while you sleep, and bakes up golden and caramelized by morning.

No matter if you’re hosting brunch or just want a cozy make-ahead treat, this recipe delivers that nostalgic homemade taste every time.

Prepare The Base

Start by melting butter and brown sugar together in a saucepan until smooth and slightly bubbly.

Pour the mixture into the bottom of a large baking dish, tilting it gently so the caramel-like coating spreads evenly.

This buttery layer becomes the rich, sweet foundation that gives the casserole its irresistible texture.

Assemble The Bread And Custard

Cut or tear a loaf of crusty bread – French, brioche, or challah all work beautifully. The older and drier the bread, the better it absorbs the custard.

Scatter the pieces evenly into the prepared dish, adding any extras like nuts, chocolate chips, or fruit if you’d like.

In a separate bowl, whisk together milk, eggs, vanilla, and a touch of sugar, then pour the mixture over the bread.

Press the pieces down lightly to help them soak it up. Cover the dish and refrigerate for at least 8 hours, or overnight, so the bread fully absorbs the custard.

Bake Until Golden

When ready to bake, preheat your oven to 450°F (230°C).

Mix a little brown sugar and cinnamon together and sprinkle it evenly over the top for extra sweetness and crunch.

Bake the casserole uncovered for about 30 minutes, or until puffed and golden.

If the top starts browning too quickly, lightly cover it with foil.

Recipe Tip

Some home cooks prefer baking this casserole at 350°F (175°C) for 50 to 60 minutes instead.

Both methods work well – it’s really about your oven and texture preference.

The lower temperature yields a softer, custard-like interior, while the higher heat produces a deeper caramelized crust.

Either way, keep a close eye to prevent the sugar from over-browning.

Serve and Enjoy

Once baked, let the casserole cool slightly before cutting it into squares or scooping out portions.

Serve warm with maple syrup, whipped cream, or a spoonful of fruit compote.

Every bite offers that familiar French toast flavor, perfectly sweet and comforting – just like weekend mornings should be.