King Arthur bread flour and KA Lancelot high gluten flour (still learning how to use it). Also found that if you don't add all the flour and none of the salt, get the flour mixed with the water, let it rest for 10 or 15 minutes, then add the balance of the flour and the salt it makes it easier to get a thin crust without tears. Also after making, if you put it right in the fridge for a day or two the flavor of the crust seems to improve dramatically. But then you'd have to think a few days ahead which I'm not really good at...I just decided what is for dinner tonight, LOL.