In a large bowl, mix 1cup softened butter. Add 250ml of brown sugar, 125ml of sugar, 5ml of sodium bicarbonate, 2ml of salt and 5ml of ground cinnamon. Mix well. Add 2eggs and 5ml of vanilla. In separate bowl,mix 375ml of flour, and 750ml of oatmeal.If desired, add 1 1/2cup of unsweetened chocolate chips. Put flour mixture in the butter mixture.
Drop the dough on baking trays, makes about 2trays.
Bake for 7-9minutes.