Chocolate cake with strawberry mousse - Moje wypieki

Ingredients

• 130 g plain flour
• 40 g cocoa powder
• 1 teaspoon baking powder
• ½ teaspoon bicarbonate of soda
• a pinch of salt
• 125 ml buttermilk or kefir
• 125 ml freshly brewed coffee
• 60 ml vegetable oil (rapeseed or sunflower)
• 1 teaspoon vanilla extract
• 1 large egg
• 180 g light brown sugar
• 450 g strawberries (fresh or frozen)
• 1 tablespoon lemon juice
• 70 g sugar
• 12 g powdered gelatine (4 teaspoons)
• 45 ml cold water
• 400 ml double cream, chilled
• 250 ml double cream, chilled
• 1 tablespoon icing sugar
• a few strawberries, halved
• a few strawberries, blended into a sauce