This Neiman Marcus Cake? Oh, it’s that dessert your cousin brings to every potluck—the one that disappears in about five minutes flat. I’ve baked it for birthdays, lazy Sundays, and once for a neighbor just because she lent me her ladder. Every time, it gets the same reaction: wide eyes, second slices, and zero leftovers. It starts with a yellow cake mix. Yep, the humble box. But don’t be fooled. With a few pantry basics like butter, eggs, cream cheese, and powdered sugar, this cake...