-Preheat oven at 350 degrees. Treat cast iron skillet with baking spray.
- Add flour, baking soda, and salt in a bowl. Set aside.
-Put unsalted butter in a mixing bowl. Add both sugars and vanilla beating until creamy.
-Add in one egg at a time, beating after each addition.
-Slowly add the flour mixture 1/3 at a time until thoroughly combined.
-Add the semi- sweet and white chocolate morsels to the batter.
-Spread the batter into the skillet until it is even.
-Sprinkle the orange and black Reese's pieces on top of the raw cookie.
-Bake at 350 degrees for 30-40 minutes or until an inserted toothpick comes out clean.
-Remove from oven to allow to cool completely.
-Cream the butter and powder sugar until it looks light and creamy.
-If it doesn't cream add several drops of the heavy whipping cream until it creams.
-Add several drops of orange gel food coloring. Mix well to blend the color throughout the frosting.
-Test to see if the frosting can form and hold a stiff peak by taking a spoonful of frosting and turning the spoon upside down. If the frosting stays on the spoon it is ready if not then....
- Add more powder sugar 1/2 C at a time.... mix well.
-If ready scoop the frosting into a pastry bag with a star tip.
-Twist the open end of the pastry bag to push the frosting to the tip
adding last touch to the cookie:
-Holding the frosting bag with tip straight up add the orange frosting by following the outline of the skillet to the edge of the cookie.