Step 1Freeze the lard and butter until solid, at least one hour (up to overnight).
Step 2In a large mixing bowl, mix together the flour and salt. Using the coarse side of a grater, grate the frozen lard and butter into the flour. (If the lard or butter begins to stick, dust the grater lightly with flour).
Step 3Sprinkle the cold water over the mixture, a little at a time, mixing with a fork, until it just begins to form a rough clump. Handling as little as possible, press the dough into a disk. Wrap the dough tightly and chill in the refrigerator for at least 20 minutes, up to overnight.