Step 1

Line a 28cm x 18cm slice tin with baking paper, making sure to leave paper hanging over the sides.

Step 2

Place the butter into the Thermomix bowl and melt on 2 minutes, 60 degrees, Speed 3 or until melted.

Step 3

Add the biscuits and crush for 10 seconds on Speed 8.

Step 4

Add the sweetened condensed milk, lemon juice and coconut (plus finely grated lemon zest if using) to the bowl and mix on Speed 4 for 15 seconds or until combined. Use your spatula to help scrape the sides of your bowl mid way through mixing.

Step 5

Pour the mixture into your prepared slice tin and use the back of metal spoon to spread it across the tin.

Step 6

To make the icing, place the icing sugar into the Thermomix bowl and sift by pressing Turbo for 5-10 seconds. Add the lemon juice and mix for 30 seconds on Speed 4.

Step 7

Note: If your icing is too thick, add a little extra lemon juice to the mixture until it is a thick but spreadable consistency. If the icing is too runny, add a little more icing sugar and mix again.

Step 8

Pour the icing over the top of your slice and sprinkle the extra coconut over the top.

Step 9

Place the slice into the fridge for 6 hours (preferably overnight) to allow it to set.