Sandwiches are one of the most beloved foods on the planet, but not every culture stacks theirs with lettuce and turkey. Around the world, people get incredibly creative with what goes between two slices of bread.
From fermented fish to sweet spreads that sound more like dessert, global sandwich fillings can be wildly unexpected. Get ready to discover 19 fillings that will change the way you think about lunchtime.
1. Surströmming (Sweden)
If you think canned tuna smells strong, wait until you meet surströmming. This Swedish fermented herring is so pungent that many airlines have banned it from flights.
Yet Swedes adore it, especially served on thin flatbread with sliced onions, boiled potatoes, and a dollop of sour cream.
The smell is famously intense, but fans say the flavor is surprisingly mild and salty. It is a true test of culinary bravery.
2. Crocodile Meat (Australia)
Crocodile meat sandwiches are a real thing in Australia, especially in the Northern Territory where croc farming is legal and popular. The meat tastes like a cross between chicken and fish, with a firm, slightly chewy texture that holds up great on a toasted bun.
Many Aussie food markets serve it grilled with aioli and fresh lettuce. If you ever visit the outback, skipping this sandwich would be a missed adventure.
3. Fried Brain Sandwich (USA Midwest)
Once a staple in Ohio River Valley towns, the fried brain sandwich is one of America's most talked-about regional oddities. Traditionally made with sliced calf brains, it is battered and fried until golden, then served on a soft bun with mustard and onions.
The texture is creamy and soft, almost like firm tofu. After BSE concerns reduced beef brain availability, many places switched to pork brains.
It remains a proud local tradition in places like Evansville, Indiana.
4. Vegemite and Cheese (Australia)
Australians practically grow up with Vegemite in their blood. This thick, dark yeast extract has a salty, savory punch that can catch first-timers completely off guard.
Pair it with melted cheddar between two slices of white bread and you have got a national comfort food.
The key is using it sparingly. Too much Vegemite and the saltiness becomes overwhelming.
Locals swear by this combo as the ultimate after-school snack, and honestly, it is surprisingly addictive once you adjust.
5. Smashed Avocado and Marmite (UK)
Marmite is the British cousin of Vegemite, and it divides the nation with its love-it-or-hate-it reputation. When spread thinly under creamy smashed avocado on sourdough, something almost magical happens.
The umami depth of Marmite lifts the richness of avocado in a way that is hard to explain but easy to enjoy.
This combo has become a trendy brunch staple in London cafes. Sprinkle chili flakes on top and you have got a genuinely sophisticated, unusual, and satisfying bite.
6. Fried Egg and Banana (Jamaica)
At first glance, egg and banana in a sandwich sounds like a breakfast experiment gone wrong. In Jamaica, though, this sweet-and-savory combo is a beloved morning meal enjoyed across the island.
The soft, slightly sweet banana balances the richness of a fried egg in a surprisingly pleasant way.
Some versions add a pinch of salt or hot sauce for extra kick. It is the kind of simple, budget-friendly sandwich that tastes far better than it sounds on paper.
7. Witchetty Grub Filling (Indigenous Australia)
Witchetty grubs are large, white larvae that have been a key food source for Indigenous Australians for thousands of years. Eaten raw or lightly cooked, they taste nutty and rich, similar to almonds or scrambled eggs.
Some modern chefs have started incorporating them into wraps and flatbread sandwiches at native food festivals.
The idea might seem shocking at first, but edible insects are increasingly seen as sustainable protein. This filling connects ancient tradition with a very modern conversation about food.
8. Peanut Butter and Pickle (USA)
Peanut butter and pickles might sound like a dare, but this combo has a surprisingly loyal fan base in the United States. The creamy, slightly sweet peanut butter pairs with the tangy crunch of dill pickles in a way that is oddly satisfying.
Some say it even rivals the classic PB&J.
Food historians believe this pairing became popular during the Great Depression as an affordable protein-packed meal. Try it once and you might just become a convert yourself.
9. Katsu Sando (Japan)
Japan's katsu sando is proof that simplicity can be pure genius. A thick, crispy panko-breaded pork or chicken cutlet is tucked into fluffy Japanese milk bread with tonkatsu sauce and finely shredded cabbage.
The contrast between crunchy meat and pillowy bread is absolutely addictive.
High-end versions in Tokyo can cost over $20 at specialty shops, and people line up for hours to get one. It has recently exploded in popularity worldwide, showing up in trendy delis from London to Los Angeles.
10. Fried Plantain and Black Bean (Cuba)
Cuba's food culture is rich with bold flavors, and this sandwich filling is no exception. Sweet fried plantains and earthy, well-seasoned black beans come together inside a toasted Cuban roll for a filling that is both hearty and deeply satisfying.
The sweetness of the plantain balances the savory beans beautifully.
Street vendors across Havana serve versions of this combination daily. It is a vegetarian option that does not feel like a compromise at all, just pure, honest flavor.
11. Haggis on a Roll (Scotland)
Scotland's national dish, haggis, is made from sheep offal mixed with oatmeal, onions, and spices, traditionally cooked in a sheep's stomach. Served on a morning roll with brown sauce, it becomes one of Scotland's most beloved and unpretentious street foods.
The flavor is savory, peppery, and warming, far more approachable than its ingredient list suggests. Edinburgh bakeries and chip shops sell these rolls by the thousands every weekend morning.
It is hearty, affordable, and genuinely delicious if you give it a chance.
12. Eel and Cucumber (Japan)
Grilled freshwater eel, known as unagi, is a prized delicacy in Japanese cuisine, usually served over rice. But a lesser-known preparation places it between slices of soft white bread with cool cucumber slices and a generous drizzle of sweet, caramelized eel sauce.
The combination of smoky, tender eel with crisp cucumber is refreshing and rich at the same time. Specialty sandwich shops in Tokyo have made this an art form.
It is elegant, unexpected, and deeply rooted in Japanese flavor traditions.
13. Chip Butty (UK)
Sometimes the most unusual sandwiches are unusual simply because of how wonderfully illogical they are. The chip butty, a beloved British institution, is just thick-cut fried chips crammed inside a soft white roll with lashings of butter and ketchup or vinegar.
Carbs inside carbs sounds ridiculous, but after one bite it all makes perfect sense. It is comfort food in its purest, most unapologetic form.
Students, workers, and grandparents across the UK have been eating this joyful creation for generations.
14. Spam and Rice (Hawaii, USA)
Hawaii has a deeply affectionate relationship with Spam, consuming more of it per capita than any other US state. The Spam musubi is practically an unofficial state snack, featuring grilled Spam over sticky rice wrapped in nori seaweed.
When reimagined as a sandwich, it takes on a whole new portable appeal.
The salty, slightly smoky Spam pairs perfectly with sweet rice and savory seaweed. You can find variations in nearly every Hawaiian convenience store, gas station, and school cafeteria.
15. Roasted Grasshopper Torta (Mexico)
In Oaxaca, Mexico, chapulines, which are roasted grasshoppers seasoned with chili, lime, and salt, are as common as potato chips. Packed into a toasted bolillo roll with avocado, fresh salsa, and crumbled queso fresco, they create one of Mexico's most adventurous street food experiences.
The grasshoppers are crunchy, tangy, and packed with protein. This is not a novelty dish for tourists.
Locals have been eating chapulines for centuries, and the torta format makes them wonderfully accessible for newcomers willing to be bold.
16. Peanut Butter and Mayonnaise (Southern USA)
Across the American South, particularly in states like Alabama and Mississippi, peanut butter and mayonnaise sandwiches have been a lunchbox staple for generations. The creamy richness of both ingredients creates a texture that is almost impossibly smooth and indulgent.
It sounds strange, but the mild tang of mayo cuts through the heaviness of peanut butter in a genuinely pleasant way. Many Southern families have strong memories tied to this sandwich.
It is the kind of regional food that outsiders laugh at until they actually try it.
17. Anchovy and Butter Baguette (France)
France has elevated simple ingredients to high art, and the anchovy butter baguette is a perfect example. Salty, oil-packed anchovy fillets laid over a thick spread of cold, unsalted butter inside a crusty baguette creates a flavor combination that is bold, briny, and completely addictive.
The cold butter softens the intensity of the anchovies while adding a creamy richness. Parisians often enjoy this as a casual lunch paired with a glass of white wine.
It is sophisticated simplicity at its absolute best.
18. Durian Kaya Toast (Southeast Asia)
Durian is the king of fruits in Southeast Asia and also the most controversial. Its creamy, custard-like flesh has an aroma so powerful it is banned in many hotels and public transport systems.
Spread alongside sweet coconut kaya jam on crispy toast, it becomes a breakfast sandwich unlike anything else on earth.
Fans describe the flavor as a rich blend of vanilla, almond, and cheese. Singapore hawker centers serve this combination daily to devoted regulars who would not trade it for anything.
19. Lamb Brain and Spice Flatbread (Morocco)
In the vibrant street food markets of Marrakech, lamb brain sandwiches are a completely normal sight. The brains are quickly sauteed with cumin, paprika, and a swipe of spicy harissa, then wrapped inside warm, pillowy khobz flatbread with fresh herbs and a squeeze of lemon.
The texture is soft and delicate, soaking up every bit of spice beautifully. Locals eat these standing up at tiny stalls in the medina.
It is street food at its most honest, flavorful, and surprisingly approachable for the curious traveler.
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