Peek-a-boo Battenberg cake

INGREDIENTS

• 225g very soft salted butter , plus a little extra for greasing
• 225g golden caster sugar
• 225g self-raising flour
• 85g ground almonds
• 3 large eggs
• ½ tsp vanilla extract
• ½ tsp almond extract
• 1 tbsp milk
• 225g very soft salted butter
• 1 tsp rosewater
• a little artificial pink food colouring (see tip, below)
• jar of apricot jam
• a little icing sugar , for dusting
• 2 x 500g packs white marzipan (you'll have trimmings, but better to have leftovers than leave yourself short)