Line a baking tray with baking paper/parchment and set aside.
In a large bowl, mix together the oats, flour, cinnamon powder and baking soda.
In another bowl, melt the butter, and add vanilla extract and brown sugar and mix well.
Add the butter-sugar mix to the dry ingredients and mix together.
Slowly add the milk as required to make a slightly sticky dough.
Finally add the raisins and cranberries and knead them into the dough.
Cover the dough and put it away in the fridge to chill for 30 minutes.
Meanwhile, pre-heat the oven to 180 degree C.
Take out the dough and divide into equal sized balls. Flatten each one slightly and arrange on the tray leaving an inch between each.
Bake for 20-23 minutes or until the edges become a light golden brown.
Cool on a wire rack. Store in an airtight container.