Preheat oven to 350 degrees F.
Line baking sheet with parchment paper or grease baking sheet well.
Cream the butter and sugars together.
Add instant vanilla pudding mix to butter/sugar mixture and mix well.
Add eggs and root beer concentrate an beat well to incorporate ingredients.
Add flour and baking powder and mix together.
Next, add in the white chocolate chips and fully combine (cookie dough will be extremely thick, but that's fine).
Place 1 tablespoon of dough for each cookie on to cookie sheet. Repeat for all of the dough.
Bake for 10-12 minutes. When bottoms have browned and tops seem cooked, take them out. Check every minute towards the end to make sure they don't burn.
ENJOY!