In a large mixing bowl, combine 2 cups of rolled oats, ½ cup of unsweetened cocoa powder, and ½ cup of chocolate chips. Stir the dry ingredients thoroughly until evenly distributed.

In a small saucepan over low heat, combine 1 cup of peanut butter and ½ cup of honey or maple syrup. Stir continuously for 2-3 minutes until smooth.

Pour the warm peanut butter mixture over the dry oat mixture and stir until all the oats are coated and the mixture is thick.

Line an 8x8-inch baking dish with parchment paper and transfer the mixture into the dish, pressing it down firmly into an even layer.

Place the baking dish in the refrigerator and chill for at least 1 hour until firm.

Once set, remove the bars from the dish using the parchment paper and cut into rectangular or square shapes.