From the shop Cafe Pets:

Real Cooks Don’t Use Recipes t-shirts and gifts. This funny cooking design makes a great gift for any home cook or chef. Please take a look at all our cooking humor products.
Sizes: S,M,L,XL,2XL.

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I like the real cooks don’t use recipes shirt because it adds a bit of elitism to your everyday cook.  I know that I am definately not a real cook.  Heck, I still read the instructions on soup, let alone go without recipes.  If you happen to be a good cook or you know someone who is, this is a great shirt for them.