Discard (or eat) the off-cuts. Place the 18cm/7in non-slip mat on the turntable and put the 20cm/8in cake board on top. Put a dab of pink buttercream on the cake board and place one of the sponges ...

4. Reduce the mixer speed to medium and add butter, 2 tablespoons at a time, until each chunk is fully combined and the buttercream appears smooth and creamy. 5. Scrape the bowl’s sides and bottom, ...