1. Crush pretzels finely and mix them with oats and cereal in a large bowl.

2. In a saucepan over medium heat, stir together corn syrup and brown sugar until it bubbles; let bubble for 30 seconds, then remove from heat and mix in peanut butter.

3. Pour over dry mixture and stir to coat.

4. Firmly press mixture into a parchment-lined, greased 8×8 pan.

5. Melt chocolate chips and peanut butter in the microwave in short bursts until smooth.

6. Spread over bars and gently shake the pan to smooth the surface.

7. Chill in the fridge for 30–60 minutes or freeze for 20–30 minutes until firm.

8. Remove from the pan, slice down the middle, and cut each half into 5 triangles.

9. Mix powdered sugar and milk until it forms a glue-like consistency, then tint with green food coloring.

10. Pipe icing onto triangles in zigzag lines and decorate with sprinkles.