Granini slice

Sponge cake

• butter, for greasing
• 60 g caster sugar
• ¼ tsp bicarbonate of soda
• ½ tsp cream of tartar
• 20 g plain flour
• 40 g cornflour
• 2 whole eggs, separated, room temperature
• ½ tsp natural vanilla extract
• 1 tbsp water, hot

Orange custard

• 380 g orange juice
• 50 g cornflour
• 80 g white sugar
• 1 egg
• 600 g pouring (whipping) cream
• 2 tsp gelatine powder
• 60 g butter, softened
• 40 g orange liqueur
• 250 g plain sweet biscuits

Orange icing

• 100 g icing sugar
• 30 g orange juice