Slice those leftover croissants into generous chunks.
In a bowl, whisk together eggs, milk, pumpkin puree, brown sugar, pumpkin pie spice, maple extract, and a pinch of salt.
In a baking dish, add the croissant chunks and pour the pumpkin mixture all over.
Cover the dish and let it chill in the fridge for at least 3 hours or overnight if preparing for the next day.
After 3 hours of soaking, or in the morning, preheat the oven to 350 degrees F. Pop the casserole in the oven, cover with foil, and bake for 35-40 minutes.
Remove the foil and finish baking for 10-15 minutes until golden and puffed up.
Once it's out of the oven, drizzle it with maple syrup, sprinkle some powdered sugar, and add a dollop of whipped cream
Enjoy