Preheat oven to 150ºC and line baking trays with baking paper.
In a small saucepan over low heat, melt the butter and honey, stirring until the mixture starts to bubble.
Add a pinch of salt. Combine the bicarbonate of soda with boiling water and add to butter mixture and then combine remaining ingredients in a separate bowl. Pour melted butter mixture and the vanilla into dry ingredients and mix with a wooden spoon to combine well.
Roll 1 teaspoon of mixture into a ball and place on tray. Repeat with remaining mixture, allowing room for spreading.
Bake for 20 minutes or until golden brown. Allow to cool on trays before transferring to a wire rack. Store in airtight container.