Tough Pumpkin Pie
"Grants a [x]-level defense boost. The intense sweetness of fortified pumpkins makes this dessert popular among children."
Breath of the Wild
If Link cooks Fortified Pumpkin, Tabantha Wheat, Goat Butter and some Cane Sugar over a Cooking Pot, he will create some Tough Pumpkin Pie. Eating this will temporarily reduce the damage he takes to enemies when attacked, in addition to restoring a variable number of hearts. Cooking under a Blood Moon may increase this effect.
Adding ingredients with clashing effects will cancel the Tough effect out, leaving a plain Pumpkin Pie, or other meal. There is no benefit to doing this. Adding another "Tough" ingredient - Armoranth, Ironshroom, Armored Carp, Ironshell Crab or Armored Porgy - will still make Tough Pumpkin Pie, in spite of the added ingredient.
Unless a critical success happens - either randomly or from cooking under the Blood Moon - eating the meal with its basic recipe will grant a "low-level defense boost". Using an Armored Porgy as a fifth ingredient will grant a "mid-level defense boost", and may grant a "high-level defense boost" with a critical success.