Preheat oven to 350°F (180C). Line a rimmed baking tray with parchment paper.
Whisk the eggs in a large bowl or pitcher. Add the milk, melted butter, maple syrup, vanilla extract, ground cinnamon, and salt. Stir to fully combine into a smooth mixture.
8 brioche slices, 4 eggs, 1 cup milk, 3 tbsp butter, 2 tbsp maple syrup, 1 tsp vanilla extract, 1/2 tsp ground cinnamon, 1/4 tsp salt
Dip each slice of the stale brioche into the batter for 30-60 seconds. Make sure they don't get too soggy. Place them side by side on the baking tray.
8 brioche slices
Bake 20–25 minutes, flipping the slices halfway through, until the tops are lightly golden and the custard is set.
3 tbsp butter
Serve with fresh or frozen berries, a dollop of greek yogurt or cream, and a generous drizzle of maple syrup.
Notes
If you're using stale sandwich bread instead of brioche, make sure to soak the bread for longer.Storage: Leftover French toast can be stored in an airtight container in the fridge for up to 2 days and reheated.