Cant remember the place I found this, but apparently it is originally a Sainsburys recipe. It was off an American website.
50g butter
50g Lindt Excellence 70% cocoa dark chocolate
100g ground almonds
1 tablespoon baking powder
1 large egg
2 tablespoons water
The chocolate needs to have around 30-40 gs of carbohydrate, read the label. The website claimed the whole quantity has 540 calories, 33g carbs, 42g fat and 8g protein per 100g and that tghis was what it said on Sainsburys website.
Method
Melt butter and chocolate in microwave - cook for 40 seconds, check and stir, then cook for another 40 seconds, chocolate should then be just at point of melting, stir until fully melted. Mix beaten egg and water into liquid.
Mix the dry ingredients together and stir in liquid, mixture should not be too dry.
Grease a microwavable glass bowl, put in mixture and cover. Cook in microwave for about 2 and a half minutes. Turn cake onto plate and place in fridge for about 2 to 4 hours.
Serve cake cold with raspberries and sour cream.
You could try replacing butter with oil of some kind
I make this about once a month