1. Prep your 9x9 square pan with nonstick cooking spray

2. In a large sauce pan melt your butter over low/medium heat until it starts to foam (this takes 2-3 minutes)

4. Turn your stove to low heat and stir constantly until your butter becomes a light brown color

5. Turn off the heat on the stove, add vanilla and salt to the sauce pan and stir

6. Add your mini marshmallows to the sauce pan and start gently stirring until the marshmallows soften

7. Put the sauce pan over low heat and stir the marshmallows until they are soft and gooey with minimal lumps

8. Remove pan from heat and add Lucky Charms to the saucepan (making sure to keep some Lucky Charm marshmallows for the last step)

9, Gently stir until the marshmallow mixture covers all of the cereal

10. Transfer mixture to a prepared 9x9 pan and press into an even layer making sure to not push too hard

11. Top with the saved Lucky Charms marshmallows, gently pushing them onto the top of the bars

12. Let cool at room temperature for 30 minutes and then cut and serve!