Preheat your oven to 325 decrees F.
Line 2 baking sheets with parchment paper.
With your mixer or food processor blend together flour and butter. Add the sugar, salt and vanilla extract. And mix until the dough comes together. Lightly flour a work surface and turn the dough onto it. Roll the dough to a thickness of 1/8 inch.
Using a 2 1/2 inch (not bigger than this) round or heart (for Valentine’s Day) cookie cutter cut out as many rounds as you can. Briefly knead the dough scrapes together just until smooth, roll out and cut more. Repeat this until you have no dough left. You should be able to make around 32 cookies. If the dough becomes to soft freeze it for couple minutes and continue rolling and cutting.
Transfer the rounds to the prepared sheets and bake for 11-14 minutes. Transfer the baked cookies to wire rack and let cool completely. Gently spread 1 Tbsp of Nutella on the flat side of a cookie and place the second cookie on top of Nutella. Dust with confectioners’ sugar and serve. You can also dip these in melted dark chocolate or roll in crashed nuts.