Jelly Belly has whipped up its candy making magic to bring you Harry Potter Jelly Slugs! Fun-to-eat Jelly Slugs are as delicious as they are entertaining! Packed with 5 intense fruit flavours like banana, pear, sour cherry, tangerine and watermelon, these gummies make the perfect treat. Jelly slugs were a confection sold at Honeydukes Sweetshop. They are gummy candies that look like slugs. Obviously, they are a very popular sweet because Harry overheard Mrs Flume saying that they were out and needed to get some more