Preheat the oven. Preheat your oven to 425°F (220°C), using conventional heat rather than convection. If using silicone molds, check that they are suitable for this temperature.
Prepare the molds. Carefully grease the canelé molds with a thin layer of softened unsalted butter. Make sure all the fluted grooves are evenly coated. Place the molds on a sturdy baking sheet.
Stir the batter. Remove the batter from the refrigerator and stir gently. Some of the ingredients may have settled during the overnight resting period.
Fill the molds. Divide the batter among the prepared molds, filling each approximately three-quarters full. This allows room for the batter to rise during baking.
Begin baking. Place the baking sheet in the preheated oven. Bake large canelés for the first 15 minutes at 425°F (220°C).
Reduce the temperature. Lower the oven temperature to 320°F (160°C) and continue baking for approximately 45 minutes. The exterior should be a deep chestnut brown with a well-caramelized crust. Exact baking times may vary depending on your oven and the material of your molds.
Remove from the molds. Take the molds out of the oven and let them stand briefly. Carefully unmold the canelés while the molds are still warm. Be extremely careful, as the molds will be very hot.
Cool completely. Transfer the canelés to a wire rack and allow them to cool completely. The exterior will become firmer as they cool.
Important: Baking Mini Canelés
The baking time of 15 minutes at 425°F (220°C), followed by approximately 45 minutes at 320°F (160°C), is intended for large canelés.
For mini canelés, this total baking time is generally too long. Begin checking them earlier and adjust the baking time according to the size and material of your molds.