Pre-heat oven to 350 degrees. Grease or line 2 sheet pans with parchment paper.
In a large mixing bowl, pour together melted butter and cake mix. Stir until partially combined.
Add in egg and stir to combine.
Add in milk and stir to combine. Fold in white chocolate chips.
Scoop tablespoonfuls of dough onto lined cookie sheet.
Bake for 8-10 minutes. Cookies are done when the tops are dry.
Allow to cool completely and enjoy!