MAKES 1 TRAY
For the dough: 1 cup (220 g) soft butter, 2/3 cup (80 g) powdered sugar, 1 tbsp vanilla sugar, 1 pinch salt, a little bit of organic lemon zest, 1 egg, 1 egg yolk, 1 cup + 3 tbsp (150 g) flour, 1¼ cups...
Heat oven to 350°. Mix flour, margarine and powdered sugar. Press in ungreased baking pan, 8x8x2 or 9x9x2 inches, building up ½-inch edges. Bake 20 minutes....