In a large bowl, cream together the butter, brown sugar, egg and vanilla until smooth.
Carefully pour flour, salt and baking soda into a sifter and sift over wet ingredients. Add spices and stir. Then add oats and raisins and stir once more.
Chill the dough for 5-10 minutes. Then scrape into a buttered, lightly floured OR parchment lined 8x8 metal or glass dish and flatten until smooth (adjust number/size of pan if altering batch size).
Bake for about 25-28 minutes or until nice and golden brown on top and the sides pull away from the pan.
Let cool in the pan and then slice and serve. Store covered or in baggies to keep fresh.