Hello Laura😊 It's a decoration part, so it would be good to think of it as a variety according to your preference! In the video, 2 thin chocolate bars were covered on the top of cake. You can enjoy more chocolate. And in the ingredients, only one chocolate is marked, l made the pattern using the pice of chocolate from 1 chocolate bar (you can see in the main picture!) I will delete the quantity mark about the chocolate bar, because other people may be confused. Thank you for your comment!