Stir together the quick oats, Greek yogurt, melted butter, eggs, vanilla extract, and maple syrup with a rubber spatula until combined. Allow this to sit for around 5 minutes or so while you measure the dry ingredients. This will allow the oats to soften.
In a separate mixing bowl, whisk together the salt, baking powder, baking soda, cinnamon, and flour.
Add the dry ingredients to the wet and mix until just combined using a rubber spatula.
Fold in the mini chocolate chips.
Grease a mini muffin tin and use a mini cookie scoop to distribute the batter evenly.
Bake the oatmeal cookie mini muffins at 350 degrees for 12-14 minutes, until a toothpick inserted comes out clean.
Allow the mini muffins to cool for several minutes in the pan, then transfer them to a wire cooling rack to cool completely.
Notes
Storing
Leftover mini muffins can be stored in an airtight container in the refrigerator or freezer. They will keep 4-5 days in the refrigerator or around 2 months in the freezer.