Are there any home remedies to boost a toddlers hunger?

I met some friends over Easter and one of them shared that she used cinammon to help increase her 2.5 year old's appetite. She said that cinammon contains a chemical (I googled this and its called ‘hydroxychalcone) which increases appetite. She would add a dash of cinnamon powder in the bread, pancakes, cakes, french toasts and pastries that she makes for her toddler. In Swedish, cinnamon bun (or kanelbullar) is a favourite national pastry and she would give her toddler small bites of this as well, in a bid to boost her appetite.