The day before:
1 Bring the milk to the boil with the vanilla pod split in half, then let it cool until it's just slightly warmer than your touch, about 120°F (50 °C).
2 Whisk the whole egg and the two yolks with the sugar, then add the warm milk. Let it rest for one hour, then remove the vanilla pod.
3 Add the 4.4 oz (125 g) of sifted flour, the oil and then the rum, and place in a sealed container in the fridge overnight.
The same day:
4 Heat your oven to 480°F (250 °C), gas mark 9.
5 In a small bowl, mix 3.5 oz (100 g) of flour and 1.75 oz (50 g) of icing sugar. Butter your moulds, then fill them with this mixture, then turn them upside down on the table and tap firmly so that only a thin film remains inside each mould.
6 Fill the moulds two-thirds full with the batter prepared the day before.
7 Bake at 480°F (250 °C) for 10 minutes, then at 355°F (180 °C) for 50 minutes. Don't be surprised by the very dark colour of your cannelés, that's how they should be. They are done when a knife tip inserted inside comes out dry.
Important: don't forget to unmould your cannelés as soon as they come out of the oven, because after that you won't be able to.
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