In a medium mixing bowl, whisk together the oat flour, vanilla protein powder, 1 teaspoon ground cinnamon, and sea salt until uniform.
Add the almond butter, maple syrup, and vanilla extract to the dry mixture and stir with a spatula until a stiff dough forms.
Incorporate water in 1-teaspoon increments if the dough is too crumbly to hold its shape.
In a separate small bowl, combine the coconut sugar and the 1/2 teaspoon of ground cinnamon for the coating.
Portion the dough into 12 equal pieces and roll each between your palms to form a smooth sphere approximately 1 inch in diameter.
Roll each protein ball in the cinnamon-sugar mixture until evenly coated.
Place the balls on a tray lined with parchment paper and refrigerate for at least 20 minutes to allow the texture to set.