Biscuits for 'Bach' time

No, these biscuits are not for the bath (but could be fun to try and watch a biscuit get sloppy in the water), but they are the super-quick crumbly, versatile cookies for my girls to eat before a piano lesson.  The car doesn't thank them, but their tummies do!  Inspired by all the biscuit recipes I have ever followed.  I make up the mixer in a food processor, cover it the mixer bowl and plonk in the fridge.  When I am ready to bake (normally just before school pick-up), I take out, make up and the biccies are still warm when I get to school.  The car smells nice too.

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100g (3.5oz) unsalted butter

60g (2oz) soft or dark brown sugar

1 egg

150g (5oz) flour (I use half plain and half whole)

1/2tsp baking powder, no more.

A handful of one or more of the following: chocolate of any sort, dried fruits (eg cranberries), nuts, pumpkin seeds (or slightly random, I added a packet of 'brunch mix' of seeds etc last week, given the thumbs up).

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1. Cream the butter and sugar

2.  Add the egg (with a bit of the flour) and mix

3.  Add the remaining ingredients and mix

4.  Leave in fridge for 30 mins or so

5.  Roll into balls, squish down and bake on greased baking tray for 8-10 minutes at 180C.  Don't overdo.