I use a 1:1 ratio of butter:shortening *by weight*. Also use half vodka, and add a bit of vinegar to the water. Then the flour mixture is half all-purpose, a quarter whole wheat, and a quarter *oat* flour [great flavor!]--and I add a *tiny* bit of baking soda to the flour. The flavor is heavenly, the texture is light and flaky, and the dough is easy to work. I need to make pie again soon!

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