The coconut pecan filling and topping was just enough to fill and top our chocolate cake layers. German Chocolate Cakes are often unfrosted around the sides (as we did in our German Chocolate Cake Doctored Mix Recipe)- but today, we applied chocolate buttercream around the sides.
If you are using chocolate buttercream, it is a good idea to pipe a dam of chocolate buttercream (using a disposable piping bag or ziplock bag with the tip/corner snipped away). Then, fill within the dam with the coconut pecan filling. Add the second layer and repeat. Add the third layer, top with coconut pecan topping (leave room for a frosting border), and frost around the sides of the cake.
Another popular way of serving this cake is to frost the entire cake with coconut pecan frosting. If you go this route, you will need to double the recipe.