Hi everyone

i have to make a test tube cake and was wondering if anyone can help me with giving ideas on how to make the foam for the test tube. This is the picture the customer has sent me. Any ideas? Or even something more realistic?

thanks

That just looks like fondant balls brushed with a luster dust. Super simple.

you could blow sugar bubbles -- i just googled 'blowing sugar bubbles' and got several videos and lots of links -- easy fun and be careful don't burn yourself!

I do think these are fondant balls with luster dust too.  Easy, but so time consuming.

I've made beer 'foam' with buttercream too. That has a wetter look to me.

Did a google image search, and found the original post of it here on CC.  Looks like the bubbles are indeed fondant dusted with luster dust.
http://www.cakecentral.com/gallery/i/2272053/evil-scientist-birthday-cake

my post suggesting blown sugar bubbles goes under neda_la's request for 'something more realistic' -- yes of course the pictured ones are fondant

Yes, I understood that, and those would be cool.  I just thought it would be nice to link to the original post the photo came from, both to confirm what they used and to give the decorator credit.

cool