Place dried fruit and liquid in the pressure cooker.
Make sure the sealing ring is properly in place. Steam release set to Sealing
Electric pressure cookers: Pressure cook zero minutes, high pressure (if your pressure cooker doesn't go down to zero minutes, pressure cook one minutes. Natural pressure release (i.e. let the float valve pop down on its own, go put your feet up)
Stove-Top Pressure Cookers: Bring up to high pressure and immediately remove from the heat. Allow to drop pressure naturally.
Stir in a couple more tablespoons of alcohol for flavour - it will absorb quickly in the residue heat - and leave to cool.
It's now ready to use in your Christmas Pudding or whatever you decide to make
Notes
A general rule of thumb is 500g dried fruit needs around 150ml liquid to just cover it.