Wanda – you’ll just have to get a measuring tape and measure the outside perimeter of each pan to get a total length needed (in inches), then divide by 12 (or however long your mold is – mine is 12 inches). I always make 2-3 extras just in case. And yes, you can just lay several in the bottom of your container, cover with wax paper, do another, etc. Yes, they’ll stick to buttercream just fine. If it’s really crusted, you may want to paint a thin layer of simple syrup on the back of the beads to help them stick.

Ooops! I forgot to ask: The cake that I have to do, the bride wants it in Buttercream Frosting. Would the pearls adhere well into buttercream?

Thank you Rose for your quick response. So, let me get this straight: Can I store them in layers, without touching, one row stacked on top of another with wax paper in between? I have the same silicone mold: How many should I make in order to cover a 6, 8, 10 + 12 heart cakes?

I make them, then store them in an airtight container with wax paper in the bottom (and between layers if you have lots) and then FREEZE them. Before you put them in, dust them with a little bit of cornstarch and leave gaps between them so they’re not all touching. SHortly before you’re ready to use, take them out of the freezer and spread them out. They may get a little condensation on them, but it’ll dry in 10-20 minutes. Keeping them cool/cold prevents them from hardening and drying out so they’ll still be flexible for you to put on the cake.

Personally, I would not think that’s enough cake. I’d probably do 6″, 8″, 10″ and 14″ to get 152 servings.