Preheat the oven to 350°F and line an 8x8-inch baking dish with parchment paper, allowing the edges to hang over for easy removal.
In a large mixing bowl, combine the pumpkin puree, peanut butter, honey, and vanilla extract. Stir until smooth and fully incorporated.
Add the rolled oats, protein powder, cinnamon, and salt to the wet ingredients. Mix thoroughly until a thick, cohesive dough forms.
Fold in the mini chocolate chips evenly throughout the dough.
Transfer the dough to the prepared baking dish and press it into an even layer using a spatula or your hands.
Bake in the preheated oven for 20 minutes, or until the edges are lightly golden and the center is set. Let the bars cool completely in the baking dish before lifting them out using the parchment paper and slicing into 12 equal bars.