11.   Add butter and shortening and cut in until mixture resembles coarse meal.

12.   Add butter, and pulse until mixture resembles fine bread crumbs.

13.   Add the butter, and process until the mixture resembles coarse meal.

14.   Add the cubed butter and pulse until the mixture resembles coarse meal and begins to stick together.

15.   Add butter and cut into flour mixture until mixture resembles coarse cornmeal.

16.   Add butter, and process until the mixture resembles cornmeal.

17.   Add butter, process until mixture resembles coarse meal.

18.   Add lemon zest and butter and mix until mixture resembles coarse meal.

19.   Add shortening and cut in with pastry cutter or two knives until mixture resembles coarse crumbs.

20.   Add butter and rub with fingertips until mixture resembles coarse meal.