Speedy citrus layered cake

Orange cake

• 230 g unsalted butter, softened and cut into pieces, plus extra to grease
• 1 orange, large (approx. 220 g), unpeeled, trimmed, cut into quarters and pips removed
• 3 eggs
• 200 g white sugar
• 300 g self-raising flour
• 1 pinch sea salt

Lemon cake

• 1 lemon, large (approx. 220 g), unpeeled, trimmed, cut into quarters and pips removed (see Tips)
• 230 g unsalted butter, softened and cut into pieces
• 3 eggs
• 200 g white sugar
• 300 g self-raising flour
• 1 pinch sea salt

Citrus cream cheese icing

• 375 g cream cheese, cut into pieces
• 270 g unsalted butter, softened and cut into pieces
• 450 g icing sugar
• 1 tsp natural vanilla extract
• 1 orange, zest only, no white pith
• 1 lemon, zest only, no white pith