Start by lining a 9x9-inch baking dish with parchment paper for easy removal of bars once set.
In a medium saucepan over low heat, combine the unsalted butter, brown sugar, honey, creamy peanut butter, and vanilla extract. Stir continuously until smooth and well combined. Do not let it boil.
In a large mixing bowl, combine the quick oats, crispy rice cereal, and chopped pretzels. Mix well to distribute evenly.
Pour the melted mixture over the dry ingredients. Stir with a spatula or wooden spoon until everything is evenly coated and sticky but manageable.
Gently fold in the mini chocolate chips until evenly distributed throughout the mixture.
Transfer the mixture to the prepared baking dish. Press down firmly and evenly to pack tightly so bars hold together.
Place the baking dish in the refrigerator for at least 2 hours to set and achieve the perfect texture.
Once set, lift the bars out using the parchment paper. Cut into squares or rectangles and enjoy!