Preheat oven to 400 degrees F. Prepare a muffin pan with 12 paper liners.
In a large bowl, combine pumpkin, brown sugar, syurp and apple juice. Mix well to combine.
Add flour, baking powder, baking soda, salt, pumpkin pie spice and chocolate chips to wet ingrediens, and mix until just combined. Do not over mix.
Scoop batter into prepared muffin cups and bake for approximately 20-25 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Remove from oven and allow to cool on a wire rack in muffin pan for approximately 10 minutes. Then carefully remove muffins from pan.
Store any remaining muffins tightly covered.