Grease and line 8” square tin.
Mix flour, powdered sugar, cocoa powder, baking powder and baking soda.
Add curd, oil, milk and essence and mix to form a smooth batter.
Pour the batter into the prepared cake tin and level it using a spatula.
Bake the cake in preheated oven for 17 minutes.
Remove from oven, flip onto a wire rack, remove the tin and lining and let it cool completely.
Line the same 8” tin with parchment paper with overhanging edges.
Place the chocolate cake first and apply a layer of jam on it.
Place the strawberry cake on top and add another layer of jam.
Place the vanilla on top and cover it with the overhanging parchment paper.
Place a heavy board or a baking tray on top and refrigerate for minimum three hours.
Melt chocolate and butter until smooth.
Pour it on top of the vanilla cake and refrigerate it again until set.
Flip the cake onto a tray, top it with more chocolate glaze and refrigerate again until set.
Place the cake on a cutting board after flipping it. Use a warm knife to slice the cake. Trim the edges for a neat finish.
Serve the cookies at room temperature.