Preheat your oven to 350°F. Line the bottom of an 8x8 pan with parchment paper spray or with cooking spray.
In a medium mixing bowl add the peanut butter, eggs, honey, and vanilla. Mix to combine. Stir in baking soda, old fashioned oats, and whole wheat flour until everything is evenly incorporated.
Place batter in the prepared pan and press mixture into the bottom of the pan in an even layer. Bake for 15-17 minutes. If you overcook it, it may get dry. Stick a toothpick into the center, when it comes out clean it's done.
You can stop here or add a little chocolate topping. While bars cool on a wire rack, melt chocolate in the microwave in 30-second intervals, stirring between intervals until completely melted.
Once your chocolate is melted, drizzle over the top of the bars. Enjoy!
You can substitute regular flour for the whole wheat if you prefer. The chocolate drizzle is optional, but it makes the bars extra tasty. Nutritional information is approximate and was calculated using a recipe nutrition label generator.★ Did you make this recipe? Don't forget to give it a star rating below!