After touring the Cascade Brewery in Hobart, Tasmania, I discovered how Vegemite is made. Two-thirds of the leftover yeast from the beer-making process is used to form Vegemite. The other third of the yeast is used for pig feed. The yeast for vegemite is cleaned afterwards to remove the hops, and then salt + celery/onion extracts are combined to give it more flavor.
But what you really want to know is…
How to Make a Vegemite Sandwich:
-2 slices of bread
Spread butter on toasted bread, lightly coat a layer of Vegemite over the butter (a little goes a long way), slap the two pieces of bread together, and you have a Vegemite sandwich.
In my opinion, it’s terrible. But Aussies find peanut butter and jelly sandwiches revolting, so to each his own I guess.