Preheat the oven to 220 deg C / 428 Deg F and fan to 200 Deg C / 392 Deg F.
Fill a deep baking tray with hot water and place at the bottom of the oven.
The steam is needed for the crust.
Once the oven is preheated, slash the baguettes on the top with a sharp knife or a lame.
If you made the makeshift tray, remove the bottle before baking.
Place the baguettes into the oven and bake for 25-30 minutes. If you have a thermometer, the baguettes are done when the internal temperature of the bread reads 90 Deg C / 194 Deg F. They should sound hollow when tapped at the bottom.
Remove and let it cool completely on a wire rack before slicing or serving.