Preheat the oven to 375°F. Line a muffin tin with paper liners or lightly grease the muffin cups.
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and pumpkin pie spice. Set aside.
1 ¾ cups all-purpose flour, 1 teaspoon baking powder, 1/2 teaspoon baking soda, 1/2 teaspoon salt, 2 teaspoons pumpkin pie spice
In another bowl, mix together the pumpkin puree, granulated sugar, brown sugar, vegetable oil, eggs, and vanilla extract until smooth and well combined.
1 cup pumpkin puree, 1/2 cup granulated sugar, 1/2 cup brown sugar, 1/2 cup vegetable oil, 2 large eggs, 1 teaspoon vanilla extract
Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Be careful not to overmix; a few lumps are okay.
Gently fold in the chocolate chips until evenly distributed throughout the batter.
3/4 cup semi-sweet chocolate chips
Spoon the batter into the prepared muffin cups, filling each about 3/4 full.
Bake for 15-16 minutes, or until a toothpick inserted into the center of a muffin comes out clean, with perhaps a few moist crumbs attached.
Allow the muffins to cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely or serve warm.