Combine the butter, sugar, eggs and vanilla in a bowl. If you want to use a mixer, just soften the butter in the microwave. If you prefer to stir by hand, melt the butter completely before adding the other ingredients.
Add flour, oats and baking soda and beat or stir to combine.
Mix in chocolate chips and cranberries.
Scoop onto greased cookie sheet and bake at 350 degrees for 10 minutes