Preheat your oven to 350°F (175°C). Grease the baking dish or line it with parchment paper for easy removal.
In a large mixing bowl, combine the canned pumpkin puree, almond butter, and maple syrup. Whisk until smooth.
Add the eggs and vanilla extract to the mixture, stirring until well combined.
In a separate bowl, mix together the baking soda, ground cinnamon, ground nutmeg, ground ginger, and salt.
Gradually fold the dry mixture into the wet mixture using a rubber spatula until just combined. If using, fold in the chocolate chips.
Pour the batter into the prepared baking dish, spreading it evenly.
Bake in the preheated oven for 25 minutes, or until a toothpick inserted in the center comes out clean.
Allow the bars to cool in the pan for about 10 minutes before transferring them to a wire rack to cool completely.
Once cooled, cut into 16 bars and serve.