Whisk together the dry ingredients in a mixing bowl: flour, salt, baking soda, and baking powder.
In another bowl, whisk together the whole greek yogurt, maple syrup, vanilla extract, and melted butter. Whisk in the eggs until combined.
Add the dry ingredients to the wet and stir until just combined. Do not over mix.
Fold ¾ cup of the mini chocolate chips into the batter.
Line an 8 by 8 baking dish with parchment paper. Leave enough overhang on the sides to be able to pull it out when it is done.
Pour the batter into the parchment paper lined pan and smooth it out. Top the batter with the remaining ¼ cup of mini chocolate chips on top.
Bake the snack cake at 350 degrees for 28-32 minutes, or until a toothpick inserted comes out clean.
Allow the cake to cool 10 minutes in the pan, then remove it by pulling the parchment paper out. Once it is cool enough, cut it into 12 squares.
Allow the cake squares to cool completely, then store any leftovers in an airtight container in the refrigerator for 4-5 days.