Prepare pan: Grease and line an 8-inch or 9-inch (20cm) square pan with parchment paper.
Crush biscuits: In a high-speed food processor, crush biscuits to a crumb. Transfer to a large mixing bowl.
Mix base: Add coconut and lemon zest to the biscuits and mix until well combined.
Add Liquids: Pour in the condensed milk and lemon juice, mix until well combined and it all sticks together.
Press firmly: Spread the mixture into prepared pan and press down into an even layer.
Lemon Icing
Make icing: Sift powdered sugar into a bowl. Stir in lemon juice until smooth and thick.
Spread & chill: Spread the icing over base and refrigerate for 3-4 hours or until set.
Slice & serve: Cut into squares and enjoy!
Video
Notes
Fridge: Store in an airtight container up to 5 days.Freeze: Wrap slices individually and freeze up to 2 months.Thaw: Defrost in fridge overnight or at room temperature for 30 minutes.