I'm interested in selling a product for which there is currently a patent granted for the recipe on. I'd like to be able to offer customized features of this product - such as natural color dyes and scent upon ordering, thus making it a custom order which isn't currently offered anywhere. Is that legal to do?
After customizing the color and the scent, does the end product possess all the features claimed in the patent? If yes, then it is still an infringement and I presume this is illegal in every country the patent exists.
For example, if the patent claims aromatic candles, which are made of features A, B and C and you provide aromatic candles with features A, B and C, plus color and scent customizing, then your product still falls into the scope of the claim. This is pretty much the definition of infringement.