Hoping you are still answering questions about this...I've had this marked as a "must make" for a while and am going to make them this weekend when our neighbors come over for spaghetti & meatballs. 1. I couldn't find KA Pastry Blend, but have "pastry flour", will that work? Or should I use all-purpose? 2. And 1/2 c potato flake replaces 3 TBP potato flour? Thank you, thank you! I bought a back-up loaf of ciabatta in case I mess it up! :) Bridget: hi there. This is Susan (PJ is in a meeting for a while). You can come very close to our Mellow Pastry Blend by using half all-purpose and half pastry flour. Potato flakes are much lighter and take up much more space than potato flour, which is ground to a powder, and that's why the substitution has a larger volume. Hope this helps. Susan

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