Preheat the oven to 190C.
Leave 170g of butter to soften.
Add 170 of sugar, preferably unrefined brown or muscovado, for more flavour.
Add 2 eggs.
Add 1 1/2 tsp vanilla extract
Mix the wet ingredients together thoroughly.
Then, add dry ingredients:
210g flour (I use No.4 untreated Baker's, as we always have it on hand),
1/3 tsp bicarbonate of soda
3/4 tsp of salt
210g porridge or jumbo rolled oats
100g of dark chocolate, broken into pieces, or dried fruit
Make sure the mixture is fully blended together, spoon into mounds on a greased baking tray--this should make around 18 cookies, depending on the size.
Bake for around 10 minutes, until golden, then leave to cool.