1.Take all purpose flour, baking powder, baking soda, salt and pumpkin-pie spice in a bowl. Mix well.
2.Take pumpkin puree, oil, eggs, sugar and flax meal in a bowl and beat until well combined.
3.Add the dry ingredients and mix until just combined. Fold in the chocolate chips.
4.Pour in lined muffin cups(fill about 2/3 cup) and top with chocolate chips. Bake in a 350F preheated oven for 25- 30 minutes until a tooth pick inserted in the center comes out clean.