Begin by placing a medium saucepan over low heat and combining the natural peanut butter and honey (or maple syrup). Continuously stir the mixture until both are fully melted and smoothly blended together.
Once combined, promptly remove the saucepan from the heat source and stir in the vanilla extract, ensuring it's evenly mixed into the warm peanut buttery blend.
In a large mixing bowl, combine the rolled oats, protein powder, and sea salt thoroughly. Pour the warm peanut butter mixture over the dry ingredients and mix vigorously until everything is well integrated.
Gently fold in the dark chocolate chips. This is also the time to incorporate any optional toppings like chopped nuts or shredded coconut, if using.
Prepare an 8x8 inch baking dish by lining it with parchment paper, allowing for some overhang on the sides. This will facilitate easy removal of the bars once set.
Transfer the blended mixture into the prepared baking dish, using your fingers or a spatula to press it down firmly and evenly. Note that the firmer you pack the mixture, the denser your bars will be once they set.
Place the dish in the refrigerator and allow it to chill for at least 1-2 hours to fully set and firm up.
After the setting time, lift the bars out of the dish using the prepared parchment paper. Slice into squares or rectangles as desired.
For an extra touch, feel free to drizzle additional peanut butter over the top of the bars before serving or add your favorite toppings for visual appeal.
Notes
For added flavor, consider garnishing with your favorite toppings.