Ingredients:
450g granulated sugar
50g butter
25g dark cooking chocolate (at least 70% cocoa solids)
4 tbsp white wine vinegar
3 tbsp golden syrup
1/2 tsp baking soda
Method:
Place the butter, water and vinegar into a heavy-bottomed saucepan, heat gently until the butter has melted. Add the sugar, golden syrup, dark chocolate and allow to fully dissolve. Bring to a boil and heat until it reaches 138°C (use a confectioner's thermometer).
Remove from the heat, add the baking soda and stir until the bubbles subside a little. Pour the mixture into a well-oiled 18cm sandwich tin. When the mixture has cooled a little mark the surface into squares with a knife. When cold cut the toffee into cubes.
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