Preheat the oven to 350ºF.
In the bowl of the mixer, mix the butter with the sugar until everything is completely integrated. Add the vanilla and continue beating.
Add the walnut, flour, and salt. Beat until a smooth dough forms.
Spread the dough on a parchment paper or silicone mat with a well-floured rolling pin. Make the cookies the thickness you want and cut them with a cookie-cutter mold.
Remove excess dough and bake for 15 minutes.
Repeat the process until you have no batter.
When the cookies are cold, take a cookie and put a teaspoon of vegan cajeta, jam, or melted chocolate. Cover with another cookie and sprinkle with icing sugar.
