Preparation

• For rectangular cookies, lightly butter the bottom of a straight-sided 9×13-inch baking pan. For wedges, lightly butter two 9-1/2-inch fluted tart pans with removable bottoms.
• Combine the flour, cornstarch, and salt in a medium bowl.
• 在装有桨叶附件的立式搅拌机中，以中等速度搅拌黄油，糖，柠檬皮和香草，直至光滑，奶油，2至3分钟。加入面粉混合物，以低速混合，直到面团开始形成潮湿的团块，约1分钟。
• Turn the dough out into the prepared pan (if making wedges, divide the dough between the two pans). Using lightly floured fingertips, press the dough into the pan(s) to form an even layer.
• For rectangular cookies, use a bench knife or a paring knife to cut the dough all the way through into 40 bars. With the tines of a fork, prick each bar twice all the way through, spacing the holes evenly and on the diagonal. Lightly flour the tines as necessary to prevent the dough from sticking.
• For wedges, cut each pan of dough all the way through to form 12 wedges. With the tines of a fork, prick the wedges three times all the way through, spacing the holes evenly over the dough.
• 烤箱加热时冷冻面团。将架子放在烤箱的中心，然后将烤箱加热到325°F。
• Bake the dough, rotating the pan(s) halfway through, until the top(s) looks dry and golden-brown, 30 to 40 minutes. Transfer the pan(s) to a rack. Using a paring knife or bench knife, immediately re-cut the cookies along the lines. Cool completely before removing them from the pan(s).

Make Ahead Tips

Once the dough is pressed into the pan and cut, it can be wrapped and refrigerated for 1 day or frozen for up to 1 month. If freezing the dough, thaw it overnight in the refrigerator before baking.

Baked and cooled cookies can be layered between sheets of parchment or waxed paper in an airtight container and stored at room temperature for up to 4 days.