I started making the butterflies for this cake, and am threading the wire through the center. It doesn't seem to be working well, In order to get the wire through without tearing the butterflies have to be super thick. I do not like the look.

What is the best way to attach these butterflies to wire?

http://4.bp.blogspot.com/-3UEY2HviO0I/TV88Nj_IfBI/AAAAAAAAR4Q/vnvWrVLzMns/s1600/chrystal+b-s.l.ss.butterfly+wedding.jpg

What I do is poke a tiny hole in the center of the butterfly before drying. Then I roll a small butterfly body between my fingers (gumpaste) and insert a small hooked wire. When both are separately dry I paint a small amount of piping gel or royal on the butterfly, then thread the wire through the hole and dry both pieces upsidedown to stick together.

That's how I do it, I haven't had luck with just inserting the wire directly into the butterfly piece either, this works for me.

HTH Laurie

Those don't look like they are on wires.

But when I did a cake with butterflies on wire, I made the butterfly and let iy dry, then I stuck a hooked wire to it with a line of royal on the bottom.

Make your butterflies and let them dry, then heat the end of your wire that you want to go in your butterfly with a lighter till it's black. Stick that in your Gumpaste and it won't go anywhere after it cools.

If you're using a plunger cutter, stick the hooked wire into a small, sausage shaped body (shorter than the centre of the cutter) and then cut out your butterfly. Place the body in the centre of the wings and press with the plunger. The body will stick to the thin wings and the wire will be secure.

HTH

Ok if you are talking about achieving that exact same look (as the picture you attached), you don't need wires. Those butterflies are just cut out, dried, and glued on with either some tylose water, chocolate, ri, buttercream or something else.