Line an 8x8 baking pan with foil, making sure there’s a few inches of foil hanging over each side of the pan. Press the foil down tightly into the corners of the pan and grease the foil with cooking spray.
Place butter in a large saucepan over low heat and let it melt. Add marshmallows, white chocolate chips, and salt and cook making sure to consistently stir until everything is melted together.
Remove saucepan from the heat and add Rice Krispies and dried cherries, gently stirring to incorporate. Pour the mixture into prepared pan.
Press the mixture into the sides of the pan using a greased spatula. Let cool for about 1 hour.
Place chocolate chips in a small bowl and melt at 50% power in the microwave for 30 seconds. Stir and repeat until chocolate chips are completely melted.
Either drizzle chocolate over the top or spread to completely cover treats. Let cool for 30 minutes.
Lift foil sling out of the pan and place on a cutting board. Using a greased knife, cut the treats into 16 squares and serve.