In a medium-sized mixing bowl, combine the Greek yogurt, nut butter, maple syrup, and vanilla extract. Use a whisk or a spatula to stir them together until the mixture is completely smooth and well-incorporated.
Slowly add the oat flour and salt to the wet mixture. Stir gently with a spoon or spatula until a thick, dough-like consistency forms. If the dough feels too sticky, you can add another tablespoon of flour until it is easy to handle.
Add the mini chocolate chips to the bowl. Use your spatula to fold them into the dough so they are evenly distributed throughout the mixture.
Use a small cookie scoop or a tablespoon to portion out the dough. Roll the portions between your palms to form small balls, about one inch in diameter. Place them on a plate or a parchment-lined tray.
While you can eat them immediately, the texture is best after chilling. Place the bites in the refrigerator for about 20 to 30 minutes to allow them to firm up before serving.