This is a toasted sourdough sandwich with a thin layer of Vegemite, smashed avocado, baby arugula, cherry tomatoes, and hemp seeds, cooked in vegan butter until the outside is crisp. It comes together in under 15 minutes and uses ingredients most plant-based kitchens already have on hand. The Vegemite-avocado pairing is genuinely good — salty, umami, creamy, and bright all at once.
The technique that matters
Two things make or break this toastie. First, Vegemite application: spread it thin and all the way to the edges. It is far more concentrated than any other spread, and a thick stripe down the middle will overpower everything else. Scrape, don’t spread. Second, the pan temperature when you add the vegan butter matters more than most people expect. Medium heat, not high — vegan butters have lower smoke points than dairy butter, and a too-hot pan scorches the outside before the inside warms through. Give it a full 2 to 3 minutes per side without pressing down constantly; let the contact with the pan do the work.
Troubleshooting
- Avocado leaks out the sides while cooking: The avocado is too warm or too loosely mashed. Chill it briefly and mash it to a thicker, chunkier paste rather than a smooth spread — it holds its position better under heat.
- Bread goes soggy before it browns: The avocado is releasing water into the bread. Pat the mashed avocado lightly with a paper towel before spreading, or add the lemon juice right before assembling rather than mixing it in ahead of time.
- Vegemite flavor disappears completely: It was spread too thin, or the sourdough is very sour and masking it. Use a milder bread, or add a second very light pass of Vegemite on the inside face of the top slice as well.
- Outside burns before the sandwich heats through: Your pan is too hot or the bread is very thick. Lower the heat and cover the pan loosely with a lid for the first minute — it traps enough steam to warm the filling without steaming the crust.
- Hemp seeds fall off everywhere: Press them gently into the avocado layer before closing the sandwich rather than sprinkling on top at the end. Skip the garnish on top entirely — not worth the extra dish.
Leftovers and meal prep
This toastie does not store well once assembled and cooked — the bread softens quickly and the avocado oxidizes within a couple of hours even with lemon juice. If you want to get ahead, mash and season the avocado up to 4 hours in advance, press plastic wrap directly onto its surface to block air, and refrigerate it. The cherry tomatoes can be halved and kept in a small container for up to 2 days. Everything else takes under 5 minutes, so the better move is to prep the fillings and cook fresh. If you do have a leftover half-avocado, store it cut-side down on a small plate in the fridge and use it within 24 hours — it browns less than you’d expect that way.
Vegan Vegemite and Avocado Toasties
Equipment
- Sandwich press (panini press) or nonstick skillet
- Cutting board
- Chef's knife
- Small bowl
- Measuring spoons
- Pastry brush or butter knife
- Spatula
- Bread knife
- Cooling rack (optional)
Ingredients
- 1 large hass avocado ripe; pitted, peeled, and thinly sliced
- 2 teaspoons fresh lemon juice preferably freshly squeezed for brightness
- ½ teaspoon lemon zest optional, finely grated
- 4 slices sourdough bread 1/2-inch thick; choose sturdy, good-quality bread
- 2 tablespoons vegan butter softened; for spreading on the outside of the bread
- 2 teaspoons vegemite spread thinly; adjust to taste
- 1 tablespoon nutritional yeast for extra cheesy, savory depth
- ½ cup cherry tomatoes thinly sliced; choose ripe, sweet tomatoes
- 1 cup baby arugula lightly packed; or use baby spinach
- ¼ teaspoon freshly ground black pepper to taste
- â…› teaspoon crushed red pepper flakes optional, for heat
- 2 teaspoons hemp seeds or toasted sesame seeds, for garnish
- 1 teaspoon extra-virgin olive oil optional; for brushing skillet if not nonstick
Instructions
- Prep the Avocado (3 minutes): In a small bowl, fan the avocado slices and toss gently with the lemon juice and lemon zest (if using). The citrus prevents browning and adds brightness. The slices should glisten lightly, not swim in juice.
- Preheat Your Cooking Surface (3 minutes): Heat a sandwich press or panini press. Alternatively, warm a nonstick skillet over medium heat; brush with 1 teaspoon olive oil if needed. Oven option: Preheat to 425°F (220°C) and place a sheet pan inside to heat for extra crispness.
- Butter and Vegemite the Bread (3 minutes): Spread vegan butter edge-to-edge on one side of each bread slice (this will be the outside for crisping). Flip two slices and spread Vegemite thinly on the unbuttered sides (about 1 teaspoon per toastie). Aim for a sheer, even layer—its aroma should be malty and savory, not overpowering.
- Build the Layers (3 minutes): On each Vegemite-spread slice, shingle avocado slices in a single, even layer. Sprinkle with nutritional yeast. Add a few tomato slices, then a tuft of baby arugula. Season with black pepper and a pinch of red pepper flakes if desired.
- Close the Toasties (30 seconds): Top each with the remaining bread slices, buttered side facing out. Press gently to compact without squashing the fillings.
- Toast until Golden and Crisp (4–8 minutes): In a sandwich press, cook 4–6 minutes until deeply golden with faint sizzling and a toasty aroma. In a skillet, cook 3–4 minutes per side, pressing lightly with a spatula for even browning. The crust should be crisp and the center warmed through.
- Rest and Slice (1 minute): Transfer to a cooling rack for 30–60 seconds to set the crust, then slice diagonally with a sharp bread knife for clean edges.
- Finish and Serve (immediately): Sprinkle with hemp seeds (or sesame). If you love extra zing, add a final whisper of lemon zest. Serve hot while the exterior is audibly crisp.
- Oven method (alternative): Assemble as above. Place on the preheated sheet pan and bake at 425°F (220°C) for 6–8 minutes, flipping halfway, until golden and crisp.
Notes
Michelle’s Tips:
- Go Thin with Vegemite: A sheer layer delivers deep umami without overpowering the avocado.
- Edge-to-Edge Butter: Full coverage ensures even browning and a shatteringly crisp crust.
- Extra Crunch: Lightly toast the bread before assembling if your loaf is very soft.
- Subs & Variations: Use baby spinach instead of arugula; Marmite for a rounder malt note; or 1 teaspoon white miso blended with 1 teaspoon warm water if Vegemite isn’t available.
- Cheesy Twist: Add a slice of good vegan cheddar or a smear of vegan cream cheese under the avocado.
- Gluten-Free: Choose sturdy gluten-free sourdough and reduce skillet heat slightly to prevent scorching.
- Faster Skillet Browning: Preheat the pan well and press gently with a spatula during cooking.
Nutrition
Your questions, answered
Is Vegemite actually vegan?
Yes, Vegemite is vegan. It is made from yeast extract, vegetables, and spices — no animal products. It is also one of the better cheap sources of B vitamins, including B12 in some formulations, so check your jar’s label.
What can I use instead of Vegemite if I can’t find it?
Marmite is the closest swap and is widely available in the US at international grocery stores or online. If you have neither, a thin layer of dark miso paste mixed with a small amount of soy sauce gets you into the same salty-umami territory, though the flavor is not identical.
Can I use regular sandwich bread instead of sourdough?
Yes. Sourdough holds up better to the moisture from the avocado and has a sturdier crust, but any thick-cut bread works. Avoid thin sandwich bread — it compresses too much and the filling pushes out.
What if I don’t have hemp seeds?
Leave them out. Sesame seeds, sunflower seeds, or a pinch of dukkah all work as substitutes. Hemp seeds add a mild nuttiness and some protein, but the toastie is complete without them.
Can I make this without a sandwich press?
A heavy skillet works fine. Place the assembled sandwich in the pan and set another heavy pan on top to press it down — a cast iron skillet is ideal. Flip once after 2 to 3 minutes.
What can I use instead of nutritional yeast if I don’t have any?
Skip it or replace it with a small pinch of garlic powder and an extra scrape of Vegemite. Nutritional yeast adds a mild savory depth, but the Vegemite already carries most of that flavor load in this recipe.
If you liked this one
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- Vegan Full English Breakfast
- Roasted Vegetable Macadamia Dukkah Salad
- Vegan ANZAC Biscuits