Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius) and line a 12-cup muffin tin with paper liners.
In a large mixing bowl, combine pumpkin puree, almond butter, eggs, maple syrup, and vanilla extract; whisk until the mixture is smooth and emulsified.
Add the pumpkin pie spice, cinnamon, baking soda, and salt to the wet ingredients and stir until fully incorporated.
Gently fold in the dark chocolate chips using a spatula.
Distribute the batter evenly among the 12 muffin cups, filling each approximately three-quarters full.
Bake for 18 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Remove from the oven and let the muffins cool in the pan for at least 10 minutes to allow the structure to set before transferring to a wire rack.