As part of a short rest, you can cook special food, provided you have ingredients and cook’s utensils on hand. You can prepare enough of this food for a number of creatures equal to 4 + your proficiency bonus. At the end of the short rest, any creature who eats the food and spends one or more Health Dice to regain health regains an extra 1d8 health.
Additionally, with one hour of work or when you finish a long rest, you can cook a number of treats equal to your proficiency bonus, provided you have ingredients and cook’s utensils on hand. These special treats last 8 hours after being made. A creature can use a bonus action to eat one of those treats to gain temporary health equal to your proficiency bonus.