Step 1: Preheat your oven to 350°F (175°C) to ensure it’s hot enough to bake the bars evenly.
Step 2: Line your 9x9-inch baking pan with parchment paper, allowing some overhang. This will make it easier to lift the bars out once they are cool.
Step 3: In a large mixing bowl, combine the quick oats and salt. Set aside.
Step 4: In a microwave-safe bowl, combine the ⅓ cup peanut butter and 1 tbsp water. Microwave in 15-second intervals, stirring in between, until melted and well combined.
Step 5: Add the melted peanut butter, maple syrup (or honey/agave), and vanilla extract to the dry oat mixture. Stir until everything is nicely combined.
Step 6: Fold in the chocolate chips into the mixture, ensuring they are evenly distributed.
Step 7: Pour the mixture into the prepared baking pan, spreading it evenly with a spatula.
Step 8: Dollop the remaining ½ cup of peanut butter on top of the mixture. Use a knife or spatula to swirl it gently into the mixture without completely mixing it in.
Step 9: Bake in the preheated oven for 20-25 minutes, or until the edges are golden and the center is set.
Step 10: Allow the bars to cool in the pan for about 10 minutes, then use the parchment overhang to lift them out. Let them cool completely on a wire rack before slicing into squares.