Start by putting the 170 g of softened butter and 40 g of icing sugar in a salad bowl
Mix them with a tablespoon to be able to work them more easily with an electric whisk
Whisk everything 3 minutes max
Add the lime zest then the 30 g of lime juice and the vanilla extract.
Whisk everything for 1 minute
Separately, in a salad bowl, a large bowl or whatever you want, mix the 270 g of flour with the 15 g of cornstarch and the pinch of salt flower and put everything in the bowl that contains our previous mixture (butter, icing sugar, lime)
Mix with an electric whisk until you get a sort of crumble
Then mix by hand to obtain a nice ball of dough, very homogeneous.
Divide the dough in half and make two beautiful rolls of about 2 inches (try to make them smooth)
Reserve the two strands of dough in plastic wrap (each in its plastic wrap, not both in the same)
Then, if you want to make them during the day, put your dough in the fridge for 1 hour (it can be kept for 24 hours in the fridge).
If you want to use it for later, you can put it in the freezer (it will keep for several days, even several weeks) -> The sausage technique is my favorite technique for this kind of cookies, because there is no than to cut slices to cook them. No need for a cookie cutter, to roll out the dough a thousand and one times or to put it in your fingers after warming the dough with your hands.
Once the dough has cooled, preheat your oven to 150 ° C, hot air.
Cut slices of about one cm and place them on a baking sheet, covered with baking paper or other.
Bake your cupcakes for 15 to 20 minutes, depending on whether you prefer them more tender.
Let them cool to cover them with icing sugar
Last step, my favorite by far: Treat yourself !!!!