In a large bowl, combine the oats, oat flour, flaxseed, hemp hearts, brewer's yeast, protein powder, and salt.
Add the cashew butter (or nut butter of choice), maple syrup, melted coconut oil, vanilla, and butter extract. Mix until combined.
Add milk one tablespoon at a time until the mixture holds together when pressed between your fingers.
Fold in the white chocolate chips and sprinkles.
Scoop about 1 1/2 tablespoons of dough and roll into balls.
If desired, roll the outside in additional sprinkles.
Refrigerate for at least 30 minutes before serving.