Pour cake mix into a large bowl and make a "well" in the center; add oil and eggs. Using an electric hand mixer, beat until well combined. Stir in the white chocolate chips with a wooden spoon. Reserve a 1/2 cup white chocolate chips to decorate the tops of the cookies. Cover the bowl and refrigerate dough for 1 hour.
Preheat the oven to 350 degrees. Line a baking sheet with parchment paper or a Silpat mat.
Scoop out 2 tablespoons of dough and roll into a ball. Arrange 8 dough balls on a baking sheet, spacing them 2-inches apart. Decorate the top of the cookies with reserved white chocolate chips.
Bake cookies for 12 to 14 minutes until the cookies are crisp around the edges and soft in the middle.
Remove the cookies from the oven, allow them to cool on the baking sheet for 5 minutes; transfer them to a rack to cool completely.
Repeat the baking process with the remaining dough, allowing the baking sheet to cool completely between each batch.