In large bowl, mix eggs, sugar, pumpkin butter, oil and vanilla until combined.
In separate bowl, combine flour, baking soda, baking powder, cinnamon and salt. Pour into the liquid ingredients and mix well.
Fold in chocolate chips.
Fill greased or paper-line muffin cups 3/4 full. Bake for 16-20 minutes on 375 degrees or until muffins test done by bouncing back when the tops are pressed.