Add the butter and sugars to a bowl and beat until creamy
Add in the egg, and beat again. If using the vanilla and cinnamon, add it in now
Add in the plain flour, oats, baking powder, bicarbonate of soda, and salt and beat until a cookie dough is formed
Add in the raisins and beat until they're distributed well
Weigh the cookies out into ten cookie dough balls - they're about 85g each! (Or you can do them smaller at about 60g, or even bigger at 120g)
Roll your cookie dough into balls (don't roll it too tightly as this can cause problems with the cookie spreading) and put your cookie dough in the freezer for at least 30 minutes, or in the fridge for an hour or so
Whilst the cookie dough is chilling, preheat your oven to 200ºc/180ºc fan. If your oven runs hot, go for 160ºc-170ºc.
Take the cookies out of the freezer/fridge and put onto a lined baking tray. I put five cookies per tray
Bake the cookies in the oven for 10-12 minutes.
Once baked, leave them to cool on the tray for at least 30 minutes, as they will continue to bake whilst cooling!
ENJOY!
Notes
These cookies will last for 4-5 days once baked at room temperature