In a medium-sized mixing bowl, combine the Greek yogurt, nut butter, maple syrup, and vanilla extract. Use a spatula or whisk to stir until the mixture is completely smooth and the nut butter is fully incorporated into the yogurt.
Slowly add the oat flour and salt to the wet mixture. Stir gently until a thick, dough-like consistency forms. If the dough feels too sticky, you can add an extra tablespoon of flour until it is easy to handle.
Gently fold in the mini dark chocolate chips using a spatula. Ensure they are evenly distributed throughout the dough so every bite has a bit of chocolate crunch.
Scoop about one tablespoon of dough at a time and roll it between your palms to form a ball. Place the bites on a parchment-lined plate or tray. Put them in the freezer for about 15-20 minutes to firm up before eating.