01 - Line an 8x8-inch baking pan with parchment paper, allowing overhang on opposite sides for easy bar removal later.
02 - Combine peanut butter, honey, and butter in a large saucepan over medium-low heat. Stir continuously until completely melted and smooth, then remove from heat.
03 - Pour the Honey Chex cereal into the warm peanut butter mixture. Gently fold until every piece is evenly coated without crushing the cereal.
04 - Transfer the coated cereal to the prepared pan. Press firmly and evenly using a spatula or the back of a spoon to create a compact, uniform layer.
05 - Place chocolate chips and remaining peanut butter in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each, until completely smooth and melted.
06 - Pour the melted chocolate mixture over the cereal base. Spread evenly with a spatula to cover the entire surface.
07 - Refrigerate for at least 1 hour or until the chocolate is firm and the bars hold their shape when touched.
08 - Lift the bars from the pan using the parchment paper overhang. Cut into 16 equal squares with a sharp knife.