Preheat your oven to 350 degrees
Whisk together the greek yogurt, pumpkin, melted butter, eggs, vanilla extract, maple syrup, and brown sugar
In a separate bowl, whisk together the salt, baking powder, baking soda, pumpkin pie spice, and all-purpose flour
Add the dry ingredients to the wet and mix until just combined with a rubber spatula
Fold in the chocolate chips
Line a muffin tin with parchment paper muffin liners
Distribute the batter into the muffin cups, then top each one with additional chocolate chips
Bake the muffins at 350 degrees for 21 - 24 minutes, or until a toothpick inserted comes out clean