So this cake was experimental. Not the brightest idea when planning on serving it to 2o people, but with Butterfinger candy bars and chocolate cake, it was a risk I was willing to take, lol. I used 2 round cakes, each divided and filled with chocolate fudge icing and a crushed Butterfinger. I stacked them, then frosted the entire cake with homemade chocolate buttercream icing, covered with another crushed Butterfinger, then added a shell border in the buttercream icing. It turned out REALLY good! I was worried about an hour after applying the crushed pieces because they started to get really sticky. The moisture from the frosting (and the fat) combined with the candy pieces and the texture started to change, but it blended with the frosting flavors and gave the entire cake a rich butter flavor. So it all worked out!
Just don't look too closely at the lettering. It is hard to add lettering on a very textured surface!