Step 1

Spray 9x13 pan with nonstick spray.

Step 2

In a large saucepan, melt butter until fragrant (3-4 minutes) over low heat. Add marshmallows. Stir constantly until marshmallows are melted. Stir in vanilla. Add rice krispies. Mix well.

Step 3

Pour marshmallow mixture into greased pan. Use waxed paper to pat into even layer in pan. Immediately sprinkle macadamia nuts and white chocolate chips over rice krispies. Use waxed paper to pat nuts and chocolate into bars. Cover.

Step 4

Meanwhile, whisk mango puree, melted butter, salt, and two cups powdered sugar. Add remaining powdered sugar as needed to thicken glaze. Carefully drizzle mango glaze over rice krispie bars to cover pan.

Step 5

Let set at least one hour before eating.