Vegan Flapjack Recipe with Golden Syrup
By Michael
A vegan flapjack keeps everything that makes the classic good — porridge oats, golden syrup, brown sugar, a firm press and a soft, chewy middle — and changes only the fat: coconut oil or a dairy-free block stands in for the butter. Two facts settle most questions before you start. Golden syrup is vegan: it is a sugar syrup with no animal ingredients. Honey is not vegan, so it has no place in this recipe or in any swap on this page.
The vegan flapjack recipe
- Prep: 10 min
- Cook: 25 min
- Total: 35 min
- Makes: 12 bars
Oven: 170°C (150°C fan) / Gas Mark 3 — middle shelf. You need a 20cm square tin, lined with baking paper.
Draft recipe: worked out from cross-checked published recipes and not yet kitchen-tested by us. Times are a guide — use the cues in each step.
Ingredients
Method, step by step
Heat the oven and line the tin. Heat the oven to 170°C (150°C fan) / Gas Mark 3. Line a 20cm square tin with baking paper, leaving a little hanging over two sides to lift the slab out later. Coconut-oil mixtures release fairly well, but the paper still guarantees a clean lift and tidy edges.
Weigh everything out. Weigh the oats into a large bowl and the raisins or chocolate chips, if using, into a small one. Have the salt ready. Coconut oil melts quickly once it meets heat, so having everything weighed before the pan goes on the hob keeps this stage calm.
Melt the oil, sugar and syrup. Put the coconut oil, light brown sugar and golden syrup in a large saucepan over a low heat. Stir until the oil has melted and the sugar has dissolved into a smooth, glossy liquid. Coconut oil liquefies faster than butter, so this takes only a few minutes. Take the pan off the heat as soon as everything is smooth — do not let the mixture boil, or the bars will set hard.
Stir in the oats. Tip in the oats, salt and the raisins or chips, if using. Stir thoroughly, turning the mixture over until every oat is coated and there are no dry patches. The mixture will look a little looser and shinier than a butter flapjack; that is the oil, and it is fine.
Tip the mixture into the tin. Scrape everything into the lined tin and spread it roughly into the corners with the back of a spoon.
Press down firmly. Press the mixture down hard and evenly with the back of the spoon or the base of a glass, working into the corners. This matters even more than in the classic recipe: there is no butter to firm up and glue the edges, so the set comes from compacted oats and syrup. Press like you mean it.
Bake until just golden. Bake on the middle shelf for 20 to 25 minutes, until the edges are golden and the centre looks set but still slightly soft. Vegan flapjacks firm up a great deal as they cool, so err on the earlier side — an extra five minutes in the oven is the difference between chewy and hard.
Rest and score while warm. Rest the tin on a wire rack for 10 minutes, then score the top into 12 bars with a sharp knife, pressing about halfway down. Scoring now gives you clean divisions to follow once the slab has firmed up.
Cool completely in the tin. Leave the flapjack to cool fully in the tin — about an hour. This cooling stage is where the bars get their structure, as the oil and syrup firm up around the oats. Lifting or cutting while warm is the most common reason vegan flapjacks fall apart.
Lift out and cut. Lift the slab out by the paper and cut along the scored lines into 12 bars. The edges may be a touch more delicate than a butter flapjack's; a confident single press with the knife gives cleaner bars than sawing.
The fat question: what replaces butter best?
Almost every vegan flapjack failure traces back to the fat, so it is worth choosing deliberately rather than grabbing whatever is in the cupboard. Butter does three jobs in the classic recipe — flavour, binding and a firm set as it cools. No single vegan fat matches all three exactly, but each of the main options has a clear best use, and the recipe above works with any of them.
| Fat | Flavour | Set | Best for |
|---|---|---|---|
| Refined coconut oil | Neutral — the oats and syrup lead | Firm once cool; softens in a warm room | The closest thing to the classic bar |
| Unrefined coconut oil | Clearly coconutty | Firm once cool | Coconut lovers, or bars with lime zest or dark chocolate |
| Dairy-free spread (tub) | Mild, slightly salty | Softest — these spreads carry more water | A softer, cake-like bar eaten within a few days |
| Vegan block (the firm, wrapped kind) | Most butter-like of the four | Firmest and cleanest | Bake sales and anywhere a tidy slice matters |
Our default is refined coconut oil because it behaves most predictably: it melts cleanly, tastes of nothing but the oats and syrup, and sets firmly at room temperature. If your kitchen runs hot, though, any coconut-oil bar softens and can feel greasy at the edges — a vegan block, which is formulated to stay firmer, is the better choice in summer. The tub spreads are the one option to use knowingly rather than by default: their higher water content steams in the oven and leaves a softer, looser bar that stales faster.
Is golden syrup vegan?
Yes. Golden syrup is made from sugar — it is a partially inverted sugar syrup, produced from cane or beet sugar during refining, and the standard product contains no animal ingredients at all. That makes it the natural sweetener and binder for a vegan flapjack: it does the same melting, coating and setting work it does in the classic recipe, and nobody has to compromise on texture to use it. As with anything, if you are cooking for someone with a strict vegan diet, a quick look at the label of the specific tin in your hand is a sensible habit — formulations and factory practices are the manufacturer's business, and the ingredients list will confirm what is in front of you. But golden syrup itself is a plant-based product, and it is the sweetener this recipe is built on.
Why honey is not vegan
One honest paragraph, because this question comes up whenever a recipe swaps sweeteners: honey is made by bees, collected from their hives, and vegans do not eat it for the same reason they do not eat other animal products. So although a honey flapjack looks much like this one, it is not a vegan bar, and no honey-based swap belongs on this page. If you are baking for a mixed household and want the honey flavour for some and a vegan bar for others, the two recipes bake side by side happily — the honey flapjack recipe is the companion to this one, and the method is near-identical apart from the sweetener and the fat.
Gluten-free at the same time
Oats themselves do not contain gluten, but ordinary oats are grown, transported and milled alongside wheat, so standard porridge oats cannot be promised gluten-free. If you need these bars to be both vegan and gluten-free, buy certified gluten-free porridge oats — they are produced to avoid that cross-contact — and check the syrup and chocolate chips labels too. With certified oats, the recipe works exactly as written; the texture is the same. Coeliac disease is a medical matter, so if you are baking for someone with coeliac disease, certified ingredients and a clean tin-liner are the careful route rather than a judgement call.
Keeping vegan flapjacks
Once fully cool and cut, keep the bars in an airtight tin at room temperature and eat them within about a week — roughly the keeping time of the classic. Coconut-oil bars hold their texture best in a cool room; in a warm kitchen they soften at the edges, and an hour in a cooler spot firms them again. They freeze well for up to three months, wrapped individually, and defrost at room temperature in about an hour. If you are working through the site's other butter-free options, the healthy flapjack recipe uses banana and dates as its binder, the banana flapjack recipe explains the coconut-oil switch in its own terms, and the flapjack variations page gathers every version in one place.
Questions people ask
A firm vegan block is the closest swap — use the same 150g and expect the firmest set. A dairy-free tub spread also works at the same weight, but its higher water content gives a softer, looser bar that is best eaten within a few days. Avoid liquid oils like sunflower or olive: they do not set at room temperature, so the bars never firm up properly.
Nearly. Oats, golden syrup and brown sugar are all plant-based, so the butter is the only ingredient that has to change in the classic recipe. Two things to watch: honey, which some recipes use as the sweetener, is not vegan; and chocolate chips, which often contain milk — choose ones labelled vegan or free-from if you add them.
Yes. Plenty of dark chocolate is made without milk — check the label, because recipes vary and milk can hide in the ingredients list. Fold in about 75g of vegan dark chocolate chips, or melt dark chocolate over the top of the cooled bars the way our chocolate flapjack recipe does.
Usually the fat choice or the room temperature. Coconut oil stays liquid at warmer temperatures than butter, so in a hot kitchen the bars can feel oily at the edges. Chill them briefly to firm up, and if it keeps happening, switch to a vegan block, which is made to stay firm. Also check you pressed firmly and cooled fully — a loose press lets oil pool instead of binding.
Roughly, yes — about a week in an airtight tin at room temperature, and up to three months in the freezer. The exception is bars made with a tub spread: their higher water content means they stale sooner, so eat those within three or four days.
The standard product is: golden syrup is a sugar syrup made from cane or beet sugar, with no animal ingredients. If you are cooking for a strict vegan, a glance at the label of the tin you are using is always a fair check, but golden syrup is one of the straightforward ingredients — it is honey, not syrup, that vegans avoid.