Combine all ingredients (chickpeas, almond butter, almond flour, maple syrup, pumpkin purée, pumpkin spice, vanilla, almond milk, baking powder, baking soda, salt, and 1/2 cup chocolate chips) in a blender and blend until smooth. Pour the mixture into a greased or lined baking dish. Bake on 350F for 35 minutes. Top it off with vanilla ice cream or yogurt, if desired, before serving.