When you stamp an image on a sugar cookie- do you just use a regular stamp and an edible type of ink pad?  Can anyone tell me a good online store to buy them?  TIA

google Julie Usher, she's brilliant & has some how to's on stamping.

http://www.juliausher.com/blog/feature

I bought all mine from Amazon. 

Regular stamps.  Non-inked pads.   food coloring  

I take the stamp off of the wood backing, so it is more pliable, and apply food coloring gel on a makeup sponge and dab the stamp. 

You could airbrush the bottom.  http://www.cloughd9cookies.com/home/fall-in-love-with-stamping-cookies-with-an-airbrush