Add your butter and sugars to a bowl and beat till creamy - I use my stand mixer with the beater attachment!
Add in your 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 till a cookie dough is formed!
Add in your raisins and beat till they're distributed well!
Weigh your 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 180C Fan, or 200C regular! If your oven runs hot, go for 160C-170c.
Take your cookies out of the freezer/fridge and put onto a lined baking tray. I put five cookies per tray! If you want your cookies slightly flatter, squish them down slightly!
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 are best eaten on the day of baking, but can be revived by microwaving for 15-30 seconds, or putting into a hot oven for 2-3 minutes!
You can squish the cookie down to about 2-3cm so that the cookie is flatter!
If your cookie stays as a ball, you have either rolled the cookie ball too tightly or over mixed the mixture! Flatten as it's cooling on the tray and it should be okay!
You can freeze the raw cookie dough easily for up to three months, and bake from frozen if you don't want to bake the entire batch!
If you are baking straight from frozen after some time, I usually bake them for 12-14 minutes, at the same temp, but an extra couple minutes won't hurt!
Once baked, these will last for 4-5+ days!
If you can't access one of the sugars, use all of the other one - i.e. all granulated, or all light brown sugar. Using other sugars can change the texture.