A Jelly Doughnut is a non-perishable food item.
Jelly Doughnuts can be eaten, providing the player with some positive effects, including reducing unhappiness.
Jelly Doughnuts can be found in bakery display counters.
From items.txt (Project Zomboid directory/media/scripts/)
Type = Food,
DisplayName = Jelly Doughnut,
Icon = DoughnutJelly,
Weight = 0.1,
HungerChange = -7,
UnhappyChange = -15,
Carbohydrates = 35,
Proteins = 3,
Lipids = 15,
Calories = 180,
WorldStaticModel = Doughnut_Jelly_Ground,