Line an 8-inch square baking pan with parchment paper or wax paper. Set aside.
Make the dough: In a large bowl, whisk together all of the wet ingredients: peanut butter, maple syrup, coconut oil, flax egg and vanilla. Whisk until smooth.
Add all of the dry ingredients: oats, flour, and salt. Using a rubber spatula, fold the ingredients together until well combined. Fold in the add-in ingredients: chocolate chips and peanuts.
Pour dough into the prepared baking pan. Using the rubber spatula, smooth into an even layer.
Make the chocolate topping: Use the double boiler method or do the following. In a medium, microwave-safe bowl, add Chocolate Topping ingredients (1/2 cup chocolate chips and ¼ cup + 1 tablespoon peanut butter). Heat in 20-second increments until softened and melted. Stir in between heating, until smooth.
Form the bars: Pour this chocolate mixture over the cookie dough bars. Using a clean rubber spatula, smooth into an even layer.
Freeze for 20-30 minutes. Remove from freezer and slice into 16 bars. Enjoy! Storing instructions below.
Storing Instructions: Store in an airtight container in the refrigerator for 1-2 weeks. Bars can be stored at room temperature after the first day of refrigeration.Freezer: You can also freeze these for up to a month. Allow to thaw at room temperature for about 30 minutes before enjoying.