She then cooked the sheet in a toaster oven at 160 °C for about ten minutes. Not only did the design shrink by 63%, but the areas with ink on them bulged upward, creating perfectly defined ridges ...

Refrigerate for up to 3 days. Reheat in a 350-degree toaster oven or oven until warmed through and crisp. Position a rack in the middle of the oven, set a half-sheet pan on it and preheat to 450 ...