Place the Water, Butter, Sugar and Vanilla Sugar in a small sauce pan and heat on medium. Let it boil and remove from heat once the butter has melted. Let the syrup cool down in a cold water bath, mixing time to time (About 20 minutes). Set aside.
In a mixing bowl, whisk the flour and baking powder together. Make a small well.
Pour the syrup and gently fold with your spatula until almost combined.
Scrape the dough out onto the Roul'Pat™ and fold it until the ball holds together. Cover with a plastic wrap and refrigerate for two hours.
Roll out the cookie dough onto the Roul'Pat™. Then, using your cookie cutters, cut your cookies and place them on your Silpain®.
Bake for 12 minutes at 350F/180C, until golden brown around the edge, top must stay the same color. (Every oven heats differently, monitor your cookies from 10min).
Once your Aunthentic French Buttery Cookies are out of the oven, let them cool down completely directly on your Perforated Baking Sheet. Then, slide them onto a serving plate. Enjoy & Bon Appétit!
N.B. You can also store your cookies in an air tight container for a few days.