Preheat your oven to 180°C (350°F).
In a mixing bowl, cream the soft butter and brown sugar together until light and fluffy.
Beat in the eggs one at a time, then mix in the vanilla extract.
Add the grated lime rind to the mixture.
In a separate bowl, whisk together the all-purpose flour, coconut flakes, and pinch of salt.
Gradually mix the dry ingredients into the wet ingredients until just combined.
Scoop rounded balls of dough onto a parchment-lined baking sheet.
Bake for 10-12 minutes, or until the edges are lightly golden.
Let them cool on the baking sheet for about 5 minutes, then transfer to a cooling rack.