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. If you use regular paper liners, spray them with cooking spray.
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.
Remove the muffins onto a wire cooling rack to cool completely.