Chocolate in any form (candy bar, choccy milk, hot choccy, choccy syrup, choccy ice cream, etc) is the stereotypical go-to stress snack. Always keep something chocolaty stocked up for a metaphorical rainy day. I read somewhere that studies have shown that chocolate, especially dark chocolate, has some sorta chemical in it to alleviate stress, but I didn’t fact it so take that with a grain of salt.