In a medium size saucepan, place the milk, vanilla pod, and butter -Simmer on low heat for 8-10 minutes, and let it sit.
**For Thermomix users:
**TMX-Time: 7 minutes/Temperature:90 degrees/Speed: Spoon

In a separate bowl, whisk the eggs, and the eggs yolk. Set aside
Place flour, powdered sugar, and salt into the bowl of a food processor or your Thermomix bowl.
Add the eggs, the egg yolks, and the warm milk( set the vanilla pod aside), and make sure that the ingredients are well combined.
**For Thermomix:TIME: 45 Seconds/Speed:4

Strain batter through a fine sieve into a new bowl.
Stir in the rum, and add the previously used vanilla pod.
Cover, and refrigerate 24-48 hours

Preheat the oven 450 degrees Fahrenheit
Remove the batter from the fridge
Stir the batter well
Place the canele baking tray in the oven and heat for 5 minutes
Remove the canele baking tray from the oven, and grease the canele baking tray with melting butter.
Pour the batter leaving 1cm from the top
Bake the caneles at 450 degrees Fahrenheit for 10 minutes, without opening the oven, reduce the oven temperature to 375, and bake for 45 minutes. Every oven is different, and therefore, baking times may have to be adjusted.The Caneles need to be dark brown before removing from the oven.
Let them cool in the baking tray for 15 minutes. This helps preserving their shape.