
A truly flaky, tender pie crust has long been one of the trickier things to pull off without wheat flour, but this recipe nails it using a smart blend of white rice flour, tapioca starch, and potato starch. The combination gives the crust that satisfying snap and delicate layering you'd expect from a classic pastry, while xanthan gum holds everything together so it rolls out cleanly without falling apart. Frozen butter cut into the dry ingredients creates those essential pea-sized pockets that puff and separate in the oven — the same technique that makes traditional crust so irresistible. A cold egg and a splash of apple cider vinegar in the liquid mixture add just enough structure and a subtle tang that rounds out the flavor beautifully. Rolling the dough between two sheets of parchment is a genuinely clever move that keeps it from sticking and makes transferring it to the pie dish almost foolproof. Every ingredient here is naturally free from oats and oat derivatives, so there's no need to scrutinize labels or worry about hidden grain additions the way you might with store-bought pastry shells. Whether you're filling it with fruit, custard, or a savory quiche, this crust is the reliable foundation your pie deserves.
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Whisk together the white rice flour, tapioca starch, potato starch, xanthan gum, sugar, and salt in a large mixing bowl until evenly combined.
Add the frozen butter cubes to the flour mixture and cut them in with a pastry cutter or fork until the mixture resembles coarse crumbs with some pea-sized butter pieces still visible throughout.
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