Preheat oven to 350F.
Stir together the ground flaxseed and water in a small dish. Set aside to thicken. This creates a flax egg.
Whisk together the vegan milk and apple cider vinegar in a small dish to create buttermilk. Set aside.
Whisk together the all-purpose flour, brown sugar, baking powder, baking soda, cinnamon, nutmeg, ginger, and salt in a large mxing bowl.
Stir together the pumpkin purée, vegetable oil, flax egg, and milk in a separate bowl.
Pour the wet mixture into the dry mixture and stir to combine- the dough will be a little thick but that's what you want! Avoid over-mixing.
Fold in the chocolate chips using a spatula then transfer the dough to a greased loaf pan. Sprinkle the top with a few more chocolate chips and a little bit of brown sugar.
Bake for 55 to 65 minutes or until the bread bounces back when lightly pressed or a tooth pick inserted comes out clean.
Allow the loaf to cool in the pan for about 15 minutes then transfer to a cooling rack to finish cooling. Be sure to wait for it to cool completely before slicing. Enjoy!