Melt the white chocolate morsels according to package directions.

Add in 3 cups of marshmallows and quickly stir to coat them evenly with white chocolate.

Spray a small casserole dish with nonstick spray.

Quickly pour mixture into casserole dish & spread it out evenly.

Decorate with sprinkles and put in freezer as soon as possible, you don't want the marshmallows to melt.

Allow to cool and harden completely. Cut into squares or shapes and serve!