Spray a 9" X 13" pan with cooking spray.
In a large microwavable bowl, melt butter in microwave.
Add marshmallows and toss to coat in butter. Cook in microwave until marshmallows are melted. About 1 minutes. Time will vary according to microwaves.
Add vanilla and 3 T. orange jello. Stir until combined.
Add rice crispy cereal. Stir until coated with marshmallows.
Add white chocolate chips. Stir to evenly distribute.
Spread crispy treats in greased pan. Press until even.
Make frosting by adding butter, 4 T . Jello, orange extract and powdered sugar to a mixing bowl.
Mix until combined. Add orange juice as necessary to reach desired consistency. Add more powdered sugar if frosting is too thin.
Once you get desired consistency, beat on medium speed for 2-3 minutes. This helps dissolve the Jello.
Spread frosting over crispy treats. Allow to set. Cut into squares.
Add popsicle sticks if desired!