Cream the butter and sugars together.
Add instant vanilla pudding to butter and sugar mixture and mix well.
Add eggs and the root beer concentrate and beat until well incorporated.
Add the flour and baking soda and mix thouroughly.
Add the white chocolate chips and mix well.
Roll cookie dough into 1" balls and place on greased cookie sheet.
Bake at 350 degrees F for 8-10 minutes.