Preheat the oven to 230°C (446°F).
In a bowl, mix eggs, milk, and sugar.
Add flour, butter, maple syrup, and vanilla bean. Mix well.
Strain the batter and let it rest in the refrigerator for at least one hour.
Butter the canelé molds and fill them up to 80% with the batter.
Bake at 230°C (446°F) for 15 minutes, then at 180°C (356°F) for 45 minutes.
Place on a cooling rack to cool.