Actually not sure if I could find Marmite locally.

...but it's cheaper on Amazon.

Wiki:
Marmite is a dark brown paste made from beer by-products and rich in vitamin B. It is a vegan food with a salty, powerful flavour and a slogan "Love it or hate it".

I'll pass.

For non-meat-eaters, it substitutes for a beefy flavor in gravies and sauces. I eat meat, but even I love the beefy flavor of it. I can't afford to eat roast beef all that often, but marmite satisfies that craving for beefy gravy. I even make a savory oatmeal with it and steel cut oats...tastes like rice and rich, beefy gravy. Yummy stuff.