01 -
Warm your oven to 165°C (325°F) and line three 15 cm (6 inch) cake tins with baking paper. Mix flour, cornflour, baking powder, baking soda, and salt in a bowl. In a separate bowl, whip the soft butter, icing sugar, and lemon zest with your mixer at medium speed till fluffy. Drop in eggs and vanilla extract, blending until well combined. Slowly add the buttermilk and lemon juice to your dry mix until you get a smooth batter.
02 -
Split your cake mix evenly into the three tins. Pop them in the oven for 30 minutes or until they turn golden and a stick poked in the middle comes out clean. Let them sit in the tins briefly, then move to a cooling rack until totally cool.
03 -
Make your own strawberry compote and let it fully cool down.
04 -
Follow your usual steps to create the Strawberry Swiss Buttercream.
05 -
Follow your favorite method to make the Lemon Mascarpone Chantilly.
06 -
Trim cake layers if they're uneven. Put the first layer on your turntable and pipe a ring of strawberry buttercream around the edge. Fill the center with strawberry compote and lemon mascarpone chantilly. Add the second layer and repeat, then top with the third layer. Cover the whole cake with a thin layer of buttercream and chill it for at least 2 hours or pop it in the freezer for 30 minutes.
07 -
Melt white chocolate and heavy cream in a bowl over simmering water. Mix in the lemon curd and yellow food coloring, then let it cool to 30°C (86°F). Pour it over your cold cake, letting it run down the sides. Finish with leftover buttercream and some lemon slices. Let the cake sit out for 20-30 minutes before you dig in.