Heat treat the flour by spreading it on a baking sheet and baking at 350°F for about 5 minutes, or microwave in a bowl for about 1 minute until it reaches 165°F. Let it cool completely.
In a mixing bowl, beat the butter, brown sugar, and granulated sugar until smooth and creamy.
Mix in the milk, vanilla extract, cinnamon, and salt until fully combined.
Stir in the cooled flour until a soft dough forms. Add a splash of milk if needed to loosen the texture.
Fold in the white chocolate chips and sprinkles until evenly distributed.
Scoop into bowls and serve immediately, or chill slightly for a thicker texture.