Preheat the oven to 350°F. Line a loaf pan with parchment paper. Prepare the flax egg by whisking together the flax meal and water in a small bowl. Set aside to thicken for 10 minutes.
In another large mixing bowl, whisk together the pumpkin puree, oil, sugar, maple syrup, vanilla extract, and milk. Gently fold the flax egg into the wet batter once thickened.
Combine the flour mixture with the wet mixture; stir just until moistened and smooth. Fold in the chocolate chips. Transfer the batter into the prepared loaf pan.
Place the bread pan in the preheated oven for 40 to 50 minutes or until the top of the loaf is golden brown and a toothpick inserted in the center comes out clean.
FULL RECIPE AT: