For the commenter looking for American conversions for the above ingredient list, please find them below.

For the sponge: 200g soft dried pitted dates, roughly chopped: approximately 1 cup 200ml water from a freshly boiled kettle: approximately 7/8 cup 1 tsp bicarbonate of soda: 1 tsp 75g soft unsalted butter, plus more for greasing: approximately 1/3 cup 2 x 15ml tbsp black treacle: 2 tablespoons 50g dark muscovado sugar: approximately 1/4 cup 2 large eggs, at room temperature: 2 large eggs 150g plain flour: approximately 1 1/4 cups 2 tsp baking powder: 2 tsp For the sauce:

150g soft, unsalted butter: approximately 2/3 cup 300g dark muscovado sugar: approximately 1 1/2 cups 1 x 15ml tbsp black treacle: 1 tablespoon 200ml double cream, plus more to serve: approximately 7/8 cup Note: Conversions can slightly vary depending on the ingredient’s density and packing method

See more