1. Pre-heat the oven to 180°C.
2. Cream together the melted butter and sugars.
3. Sift the flour and xanthum gum together.
4. Add the vanilla extract, egg and dry ingredients to the butter mixture.
5. Mix to combine.
6. Add the crushed Mini Eggs, mixing to combine.
7. Using your hands, combine the dough into small balls.
8. Add the balls of cookie dough to a greased baking tray, pressing lightly to flatten.
9. Bake for 20 minutes or until golden brown.
10. Leave to cool before serving.