Combine first 4 ingredients in a medium bowl and stir until brown sugar dissovles.
In a separate bowl, whisk together flour, baking soda, cinnamon, ginger and salt stirring until combined. Make a well in the center of the ingredients and add pumpkin mixture to flour mixture.
Stir gently until ingredients are mixed making sure to not overstir. Gently foil in chocolate chips
Prepare mini muffins tins by lightly brushing each cup with oil (or spraying with cooking spray) to prevent muffins from sticking.
Add 1-2 Tbsp pumpkin batter to muffin cups.
Bake at 350 degrees F for 15 minutes or until a wooden pick comes out clean when inserted in the center of the muffin.