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Bonfire toffee

Hard, dark toffee made with treacle, eaten at Halloween and Bonfire Night in Britain

Photo: Dominic Winsor, CC BY-SA 2.0, via Wikimedia Commons

Bonfire toffee is a traditional British sweet made by boiling treacle, sugar, and butter or margarine until hard and brittle. It is especially linked to Halloween and Guy Fawkes Night, when it is often broken into pieces and shared. The toffee is known for its strong, slightly bitter molasses flavour and dark colour.

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  • Made with black treacle, giving a strong molasses flavour
  • Traditionally eaten at Halloween and Guy Fawkes Night
  • Known as claggum in Scotland and loshin du in Wales
  • Usually homemade and broken into pieces to share
  • Sometimes flavoured with almond, lemon, or peppermint

What is Bonfire toffee?

Bonfire toffee is a very hard, glassy sweet that snaps when broken. Its deep brown to almost black colour comes from black treacle, a thick syrup made from sugar refining. The taste is bold and bittersweet, with a strong molasses note that sets it apart from lighter toffees. Butter or margarine is used, but only in small amounts, so the texture is firm rather than chewy. Sometimes a touch of vinegar is added, giving a sharper edge and helping the toffee set. It is usually made in slabs or sheets, then broken into shards or cut into sticks.

Where does Bonfire toffee come from?

Treacle began to be used in British sweets in the 1660s, first in gingerbread. Bonfire toffee appeared not long after, but treacle was expensive and thought to be medicinal, so it remained a treat for special occasions. The word 'toffee' itself was not printed until 1825, though the sweet was made earlier, especially in northern England. By the 19th century, toffee had become popular, with many forms and names. Bonfire toffee became associated with autumn festivals, but exactly why it is tied to Guy Fawkes Night is uncertain.

How is Bonfire toffee made?

To make bonfire toffee, black treacle, sugar, and a little butter or margarine are melted together and boiled until the mixture reaches the hard crack stage. Some recipes add vinegar, which helps the toffee set and adds a slight tang. The hot mixture is poured into greased trays or moulds and left to cool and harden. Once set, it is broken into pieces. Occasionally, flavourings like almond, lemon, or peppermint are added, or a pinch of cayenne for heat. Cheaper versions may use food colouring if there is not enough treacle for a dark colour.

How and when is Bonfire toffee eaten?

Bonfire toffee is most often eaten in October and early November, especially during Halloween and Guy Fawkes Night celebrations. It is shared at gatherings around bonfires or given to children. Traditionally, it was homemade and handed out in neighbourhoods, though it can also be bought in sweet shops, sometimes as lollipops or in sheets to break up at home. In Wales, it has a place at the early morning plygain Christmas service, where people might make it after singing carols.

Kinds of Bonfire toffee

Names and recipes for bonfire toffee vary by region. In Scotland, it is called claggum, and less sweet versions are known as clack. In Wales, it goes by loshin du or taffi triog. Some recipes swap treacle for golden syrup, or add extra flavours. The texture can range from very brittle to slightly softer, depending on the recipe and whether vinegar or baking soda is used.

What Bonfire toffee means

Bonfire toffee is closely tied to British autumn festivals, especially Guy Fawkes Night, when people gather for fireworks and bonfires. It is a nostalgic sweet, often made at home and shared with neighbours. In Wales, it is linked to the Christian plygain service at Christmas. While it is now mostly found in shops during the autumn, some sweet shops sell it year-round. Its deep colour and strong taste reflect a northern British preference for darker sweets.

When Bonfire toffee is on the table

Questions people ask about Bonfire toffee

What is bonfire toffee made of?

Bonfire toffee is made from black treacle, sugar, and a small amount of butter or margarine. Some recipes also include vinegar to help the toffee set and add a sharper taste.

Where does bonfire toffee come from?

Bonfire toffee comes from the United Kingdom, especially the northern regions. It has been made since at least the 18th century and is linked to autumn festivals.

When is bonfire toffee usually eaten?

It is most often eaten during Halloween and Guy Fawkes Night in late October and early November. In Wales, it is also made at Christmas after the plygain service.

What does bonfire toffee taste like?

It has a bold, bittersweet flavour from the black treacle, with a strong molasses taste and a hard, brittle texture.

Are there different names for bonfire toffee?

Yes, it is also called treacle toffee, Plot toffee, Tom Trot, claggum in Scotland, and loshin du in Wales.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Bonfire toffee", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Thali rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes, and it is not dietary or allergy advice: recipes differ from cook to cook. If something is wrong, tell us. Last refreshed 2026-10-03.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

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