1large sponge cakestore-bought or homemade, cut into 18 even squares (see notes for more on cutting)
3cups(375g) desiccated coconut
Chocolate Icing
1cup(125g) icing sugar
¼cup(25g) cocoa powder
2tbspbutter (heaped)melted
¼cup(125ml) boiling water
¼cupcold milk
Raspberry Icing
2cups(250g) icing sugar
185g packet raspberry jelly crystals
1cup(250ml) boiling water
Instructions
Prepare the sponge: slice your sponge cake into even squares and set aside on a tray. For neat edges, use a sharp serrated knife. I also recommend you slice the very top crumbly part off the sponge. However, it is totally up to you. I go over why in the video (see notes for extra instructions).
Make the icings: For chocolate: sift icing sugar and cocoa into a bowl. Stir in melted butter, milk, and boiling water until smooth. For raspberry: combine jelly crystals and stir in boiling water until glossy. Cool in the fridge for 10 minutes. Then add the icing sugar and whisk until nice and combined. Bubbles will form but just use a spoon to take the top layer of bubbles off. (see video for more instructions).
Set up the dipping station: place bowls of chocolate and raspberry icing side by side. Prepare a shallow dish of coconut. Have two bowls of coconut for each flavour.
Dip and roll: using a fork, dunk each sponge square into your chosen icing, letting excess drip off. Roll immediately in coconut until well coated.
Rest: place coated lamingtons on a cooling tray and allow to set for 2–3 hours before serving. This helps the icing firm up and the flavour soak through
To serve: whip up some heavy cream. Slice the lamingtons diagonally through the top, but don't cut them all the way down. You want them to stay as one piece. Dollop some whipped cream in the middle and enjoy!
Notes
I suggest you watch the video to see what type of sponge I bought from the supermarket. It will show you the size and how I cut it up. For size reference, the lamingtons are 1.5 high and 2.5 inches square (roughly).