In a large mixing bowl, whisk together the vanilla protein powder, almond flour, coconut flour, and salt until no clumps remain.
Add the cashew butter, maple syrup, vanilla extract, and almond extract to the bowl.
Stir the mixture with a spatula until a thick dough forms. If the dough is too crumbly, incorporate almond milk 1 teaspoon at a time until the mixture holds together when pressed.
Gently fold in the rainbow sprinkles.
Using a small cookie scoop or tablespoon, portion the dough into 12 equal pieces.
Roll each portion between your palms to create smooth, uniform spheres.
Place the balls on a tray lined with parchment paper and refrigerate for 30 minutes to firm before serving.