Using a tablespoon, scoop batter onto parchment-lined baking sheets. Put no more than 6 to 8 on a sheet pan, as the batter will spread.
Bake for 8 minutes. Let cool completely.
Pour 1 packet of Duncan Hines® Frosting Creations™ Orange Crème Flavor Mix into 1 can of Duncan Hines® Frosting Creations™ Frosting Starter. Stir until evenly blended. Repeat with second can and packet.
Spread 1 tablespoon of the Orange Crème frosting you just created on the flat sides of half of the whoopie pies and top with remaining pies.
Tip: Store your whoopie pies between layers of wax paper to prevent them from sticking together.