Cream butter and sugars until fluffy, beat in eggs, vanilla and milk. In a separate bowl, combine oats, flour, baking soda, cinnamon, salt. Add dry ingredients to butter mixture and stir until combined. Stir in cranberries. Divide dough in half, roll into a log about 1 1/2 inches in diameter. Refrigerate until firm. Heat oven to 350, slice logs into cookies, bake on parchment lined cookie sheets leaving 1 1/2 inches between cookies. Bake for 12 to 14 minutes or until golden brown. Cool on a wire rack.