I am making a castle cake for my grand daughter and would like to know what impression mat works well to give that old rock wall textured effect

They do have rock impresstion mats. I have maybe the fmm one. Just google that and i think you will find bigger ones that the fmm. I think also. at michaels , Duff has one. hth

http://www.countrykitchensa.com/shop/cake-decorating-supplies/cobblestone-country-kitchen-texture/38/527/1327/631948/  Hi, again, here is the site for the larger one. hth

I use the cobblestone impression mat also. Love it!

Thanks appreciate the info

Thanks will check it out