Line a 9×9-inch square baking pan with parchment paper. Let some hang over the sides for easy lifting. Set aside.
In a large bowl, whisk together the oat flour, almond flour, and salt until well combined.
In another large microwave-safe bowl, add the peanut butter and heat in the microwave for 30–60 seconds until melted and smooth. Whisk the maple syrup and vanilla extract into the peanut butter.
Add the dry ingredients on top of the wet ingredients and stir well to fully combine. Then fold in the chocolate chips, keeping in mind the mixture will be thick. Transfer the mixture into the prepared pan and press evenly into the pan.
To make the chocolate topping, melt the chocolate chips, peanut butter, and coconut oil in the microwave or on the stove. Stir until smooth. Spread over the base until smooth.
Chill in the refrigerator until completely firm, about 2 hours. Allow to sit at room temperature for 5 minutes before cutting. Cut into 12-16 squares and serve or store in the fridge.
Video
Notes
Storage: Store the bars in an airtight container in the fridge for up to 7 days.