Ok- you are describing 2 different transfer methods. A BCT is not made
directly on the cake. So, no, you would not use the gel. Also, store
bought icing does lousy on a BCT (in my experience). You will be very sad when you go to remove the wax paper. However, you can use the supplies you have purchased to create a BC GLAZE. I have never used store bought icing for a gaze, but I imagine you can.
Click here for complete instructions:
This will take you to directions for a BCT, Chocolate Transfer and
Buttercream Glaze. Buttercream Glaze technique starts on page 2 at the
Let me know how you do.