Cream butter and sugar in a large mixing bowl.
Add vanilla extract and egg and mix until smooth.
Mix in dry pudding mix, baking soda, salt, and flour.
Stir in white chocolate chips.
*Chill dough 30 minutes.
Remove dough from fridge, and scoop cookie dough onto a cookie sheet lined with parchment paper.
Bake at 350° for 9-11 minutes, until edges start to turn golden brown.
Remove from oven; cool on cookie sheet 10 minutes before removing to a wire rack to cool completely.
Store cookies in an airtight container at room temperature.