Homemade madeleines are best served on the same day they’re baked. They will dry out over the next few days but you can reheat them in a pre-heated oven at 170ºC (340ºF) for 5-10 minutes until they’re warmed through. Or pop them in the microwave for 30 seconds-1 minute until they’re warmed through. They won’t be as fresh and fluffy as when you first baked them but they’ll still be delicious and you can dip them into your tea or coffee.