SERVES: 6
For the coffee and walnut cake:
150g vegetable oil, plus extra for oiling
100g ground almonds
90g ground flaxseed
50g erythritol (sugar replacement)
7g good-quality instant coffee (I use Nescafé Azera Intenso)
1 tsp bicarbonate of soda
50g walnut oil
150g grated Granny Smith apple
4 large free-range eggs, lightly beaten
For the mascarpone cream:
400ml double cream
260g mascarpone
60g erythritol (sugar replacement)
2 large vanilla pods, split lengthways, seeds scraped out
For the coffee:
6 espressos (see above), or strong coffee made with good instant coffee (warm or cold is fine)
For the topping:
2 tbsp cocoa powder
2 tbsp roughly crushed coffee beans
50g dark chocolate (80 per cent cocoa solids)