Tip;
Guinness glaze.
Place 250ml Guinness in a large saucepan and add 200g caster sugar. Slowly bring to simmer and simmer for 20-35 minutes until the liquid reduce by half or coat the back of the spoon. It might take longer or shorter time depending on the heat under the saucepan. Remove from the heat and set aside to cool. Keep in a jug or bottle and store in the fridge for a few months.