In a large mixing bowl, beat together the softened unsalted butter, granulated sugar, and light brown sugar until the mixture is light and fluffy. This should take about 2-3 minutes using an electric mixer.
Add the tablespoon of vanilla extract to the butter and sugars, mixing until well incorporated. In a separate bowl, whisk together the all-purpose flour, baking soda, and a pinch of salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Gently fold in the white chocolate chips and sprinkles. If the dough seems too dry, you can add a tablespoon of milk or cream to achieve the desired consistency.
Refrigerate the dough for about 30 minutes. This will help the flavors meld and make it easier to scoop.
Once chilled, scoop out tablespoon-sized portions of dough and roll them into balls. Place them on a parchment-lined baking sheet, spacing them about 2 inches apart.
These cookie dough balls can be enjoyed immediately or stored in the refrigerator for later.