I need to find out how I can make the color of a gold coin, any suggestions would be appreciated.

The only way I have gotten gold, is when I use gold luster dust and mix it with vodka and paint it on my items. HTH!!!

For gold fondant I color the fondant using Americolors Gold or Wiltons Buttercup Yellow (both tun out the same goldish color) and then piant it with a mixture of vodka and gold luster dust.

Can those suggestions be used on buttercream frosting?

You can't paint luster dust on buttercream. You would need to cover the cake with fondant and paint that with the luster dust.

you can achieve a gold color in butter cream if you add yellow, red and green. Start with yellow, mix it well, add red, mix well again, and then add a drop or two of green, the more you add of the red or green will give you different shades. Always start with yellow, do this with a small amount of buttercream, to get the shade you want, then add what you have colored to enough buttercream for your cake, you will have a good idea by now how much of the three colors you have to add to get the color you need.

Sorry, but I do paint on buttercream with luster dust. If you use crusting buttercream and a VERY LIGHT touch you can tip roses and "spackle" and "feather".

Beth in KY

Thank you all very much for the tips!