We've reached a new sentence! We've reached a new sentence! We are however, still inside Honeydukes:
"Ron and Hermione were standing underneath it, examining a tray of blood-flavored lollipops" (Prisoner of Azkaban 197).
The only way I can think of to make vegetarian-friendly blood-flavored lollipops is to taste-test a whole lot of things to discover what tastes irony. Firstly, that sounds like it would be decidedly not fun. Secondly, I can't think of any iron-tasting ingredients that would liquify enough to be involved in the candy-making process. So we will not be making blood-flavored lollipops.
Why do you even want to eat blood-flavored lollipops anyway?