Iced berry mousse cake - Good Food Middle East

Ingredients

• 100g butter, softened
• 100g caster sugar
• 100g self-raising flour
• ¾ tsp baking powder
• 1 tsp vanilla extract
• 2 eggs
• 500g mixed berries (fresh or frozen)
• icing sugar, to sweeten
• 3 sheets leaf gelatine
• 3 egg whites
• 140g golden caster sugar
• 300ml double cream, whipped