In a spacious mixing bowl, combine the rolled oats, protein powder, ground cinnamon, ground nutmeg, and sea salt. Stir thoroughly to ensure the dry ingredients are well mixed and evenly distributed.
In a separate bowl, whisk together the pumpkin puree, almond butter, and pure maple syrup until the mixture is smooth and creamy, ensuring all ingredients are fully blended.
Gradually pour the wet mixture into the bowl containing the dry ingredients. Use a spatula to fold the mixture together until completely combined.
Gently fold in the chopped walnuts and mini vegan chocolate chips (if using), ensuring they are evenly scattered throughout the mixture.
Prepare an 8x8 inch baking dish by lining it with parchment paper, allowing some paper to overhang the sides for easy removal later.
Transfer the combined mixture into the prepared baking dish. Use the back of a spatula or your hands to press it down firmly, creating an even and compact layer.
Cover the dish with plastic wrap or aluminum foil and refrigerate for at least 2 hours, allowing the bars to set and firm up properly.
Once chilled and set, use the parchment paper overhang to lift the slab out of the dish. Slice into bars of your desired size, making them perfect for snacking.
Notes
Serve the bars on a rustic wooden cutting board. For an extra touch, drizzle a thin line of almond butter over the top or sprinkle with a dash of cinnamon before serving!