Step 1: Prepare Your Pan
Line a 9×13-inch baking pan with parchment paper or lightly grease with nonstick spray.
This helps the bars come out easily without sticking.

Step 2: Melt Butter and Peanut Butter
In a large saucepan over medium heat, melt the butter and 1 cup of peanut butter.
Stir constantly until smooth and well combined.

Step 3: Add Marshmallows
Reduce the heat to low.
Add the marshmallows and stir until completely melted and smooth.
Mix in the vanilla extract and a pinch of salt for depth of flavor.

Step 4: Stir in Cereal
Remove the pot from heat and quickly stir in the Rice Krispies cereal.
Mix gently but thoroughly until all the cereal is evenly coated with the marshmallow-peanut butter mixture.

Step 5: Press into Pan
Transfer the mixture to your prepared baking pan.
Use a spatula or lightly greased hands to press it evenly into the pan.
Don’t press too hard—this keeps the treats soft and chewy.

Step 6: Make the Chocolate Topping
In a microwave-safe bowl, combine the chocolate chips and ½ cup peanut butter.
Microwave in 30-second intervals, stirring between each, until melted and smooth (about 1–2 minutes total).

Step 7: Spread the Chocolate Layer
Pour the melted chocolate-peanut butter mixture over the Rice Krispie layer.
Use a spatula to spread it evenly across the top.

Step 8: Add Optional Toppings
While the chocolate is still soft, sprinkle sea salt flakes, crushed peanuts, or mini chocolate chips on top if desired.
You can also drizzle with melted white chocolate for a decorative touch.

Step 9: Let Set
Refrigerate the pan for at least 1 hour, or until the chocolate topping is firm.
You can also let them set at room temperature for 2–3 hours.

Step 10: Slice and Serve
Once set, lift the bars out of the pan using the parchment paper.
Cut into squares or rectangles with a sharp knife.
Serve and enjoy!