This is a lovely chocolate cake that I’ve been making for years. It’s so simple, yet so good. I’ve put it up here for my friend Kate who has never, to my knowledge, asked me for a recipe. But she did after tasting this on Saturday. It’s a cake that keeps, a bit like gingercake, for a good few days wrapped in parchment and foil. Ideal for taking for weekends away, picnics, lunchboxes

I don’t know a child who doesn’t like this – and it’s rare I can say that; and, slightly warm, and with custard or maybe some cream, makes a nice, simple pudding.

It’s originally from Nigella Lawson’s How to Be a Domestic Goddess, but, like a lot of Nigella’s recipes, God love her, I’ve cut down the sugar dramatically (yes, really and it’s still at 250g!) and changed the flour around a bit.

225g very soft, unsalted butter

250g dark muscovado sugar

2 large eggs

1 teaspoon of vanilla extract

100g dark chocolate (70%), melted

150g plain flour

50g wholemeal plain flour

1 teaspoon of bicarbonate of soda

150ml boiling water

A 2lb loaf tin, about 23x13x7. Mine one is bigger. If you want to use two smaller loaf tins you can, cook for less time: 20min for first part, then 10minutes.

Preheat oven to 190C.

Line the loaf tin – this is really important as this is a very moist cake and it will fall apart if you have to wrestle it out of the tin. If possible leave some baking parchment overlapping so it lifts out easily.

Put the chocolate on to melt – in a bowl above a pan of simmering water, making sure the bowl doesn’t touch the water. When melted, set aside to cool slightly.

Cream the butter and sugar together with a wooden spoon, then add the eggs and vanilla. Now fold in the cooled chocolate. Mix the flours and the bicarb together.

Now you’re going to add the flour mixture and the water, a spoon at a time, stirring well between each. This is important. If you add the flour and water too fast, the boiling water will cook the flour into little balls and you’ll end up with little white flour balls in the cake. I know because I’ve made this many, many times and tried to cheat the system and it doesn’t work.

You’ll end up with a very runny batter. Put – pour- in the cake tin, and if your tin is very up to the brim already, it may be prudent to put a baking tray underneath to catch any spills. (This is why I use an even bigger loaf tin than recommended. I can’t bear to lose any to the oven.)

Cook for 30 mins, then turn down to 170C and cook for a further 15 mins. I do this exactly and end up with a very squidgy, moist cake. If you use two smaller loaf tins, cook for 20mins and then 10 at lower temperature. The top should be set and there shouldn’t be any discernible ‘wobble’ (or not much) but a skewer inserted may still have some crumbs attached due to the moistness of the cake. Don’t overcook.

Let it cool completely before taking out of the tin. It will sink a bit in the middle, don’t worry, it’s meant to. If you don’t eat it all immediately, wrap in parchment and foil and enjoy a slice every day.