Directions

1. Chop the dates into small pieces, put in a small bowl then pour over 175ml boiling water. Leave to cool, about 30 mins. Oil (using the 1/2 tsp oil) then flour 7 x 200ml pudding tins (tapping out excess flour). Sit them on a baking sheet.
2. Stir the vanilla and treacle into the dates, and mash with a fork to a rough puree.
3. Heat oven to 180C/160C fan/gas 4. To make the puddings, beat the eggs in a small bowl. Mix the bicarbonate of soda and 175g flour together. Stir the 75ml oil and demerara sugar together in a larger bowl, using a wooden spoon. Pour in the eggs a bit at a time, beating as you go. Gently fold in one-third of the flour with a large metal spoon, then half the yogurt. Don't overmix. Repeat, finishing with the last of the flour. Gently stir the mashed dates in to a thick batter. Spoon evenly between the tins. Bake for 20-25 mins.
4. Meanwhile, make the sauce. Put the muscovado sugar and butter into a small heavy-based pan. Heat over a low-medium heat, stirring occasionally, until the sugar starts to dissolve, without bringing to the boil or it may burn. The mixture will be quite thick, like fudge, and the sugar won't dissolve completely at this stage. Take the pan off the heat, then stir in the black treacle and vanilla. Cool for 1-2 mins, then stir in the creme fraiche a spoonful at a time, so it incorporates smoothly into the mixture. If it's a bit lumpy, use a small wire whisk to break them up.
5. To serve, loosen around the sides of the puddings with a round-bladed knife, then turn out onto plates. Spoon a little sauce over each one and finish with a drizzle of it on the plate. Puddings and sauce can be made up to 2 days ahead.