In a medium bowl, mix flour and sugar with a fork. Mix in Crisco shortening with your fingers, then cut cold butter into 1/4 pieces and sprinkle them into the flour mixture. Mix with your fingers some more - until mixture resembles <em>very</em> coarse crumbs.
Sprinkle vinegar over mixture on toss to combine. (The theory is that that a bit of acid helps relax the gluten formation that would otherwise toughen the pastry.)
Sprinkle ice water over the top and stir with a wooden spoon until a ball forms. Press into a ball and let rest at least 10 minutes in the refrigerator before using. (I tend to let it rest a couple of hours, but you don't have to.)
For best results, let sit at room temperature for 15-30 minutes before rolling out.
Bake according to directions for whatever you are making.
If you are making one pie crust, this will make enough for that plus a few little extra treats for the kids.
This website provides approximate nutrition information for convenience and as a courtesy only. You are solely responsible for ensuring that any nutritional information provided is accurate, complete, and useful.