Pipe or spread the buttercream onto the loaf cake, then sprinkle over the blueberries and lime zest. The blueberries can be swapped for any other berry you like, such as raspberries or blackberries.

“It's a clean palette to have fun with.” Redd-McIntosh pairs vanilla cake with a mixed berry compote and strawberry ...

For the final technical challenge Mary Berry asked the bakers to make this simple sponge with homemade jam and buttercream – without a recipe. We won't be so unkind. Mary's perfect Victoria ...

While the cake is chilling, make the buttercream. Beat together the softened butter and icing sugar in a bowl until lighter in colour, and smooth. Place 100g/3½oz of the buttercream in a piping ...

Made with just butter and sweetened condensed milk, this silky frosting is lighter than traditional buttercream but just as luxurious. Add a swirl of the homemade blackberry jam, and you’ve got ...