Mix the flour and baking powder, sift them, add other products to the blender and mix until a smooth dough. Wrap the dough in transparent foil and allow it to cool for about 30 minutes. Remove it on a floured surface and roll out crust with a thickness of 3 mm. Cut shapes optional (rectangles, circles or flowers). Over half of the pieces put a little jam and close to the other figures. Press edges to leaking filling and arrange the cookies on littered with paper baking tray. Bake in a preheated 200 ° C oven for about 10 minutes. While still hot, sprinkle the cookies with vanilla flavored powdered sugar.