Blackberry-Lemon Icebox Pie

Grasshopper pie, black-bottom pie, butterscotch pie—all are basically what used to be commonly called “icebox” pies, meaning those that require no rolling of pastry dough, no exotic fillings, and no final baking. I’m not saying that icebox pies are exclusively Southern today, only that I haven’t encountered a single one (not even in roadside diners) outside the South for decades. And, I declare, these clever pies deserve renewed attention, not only because they’re so delicious but because t