Step 1

Preheat the oven to 180 C electric / 160C fan / 350 F.

Step 2

Blend the butter, egg yolk, vanilla extract and powdered sweetener for about 1 minute until smooth, fluffy and airy.

Step 3

Add the almond flour and xanthan gum and blend until combined. Taste the dough and adjust sweetener to taste.

Step 4

Fill the cookie dough into a piping bag and pipe onto a cookie sheet lined with baking paper. Make sure you don't pipe them too flat or they may become fragile. Also, leave space between the cookies as they will spread a little.

Step 5

Bake for 10-12 minutes or until lightly browned on the ridges.

Step 6

Let the cookies cool fully before touching. They are very fragile when hot, but crisp up as they cool.