shortbread with jam

ingredients:
250G unsalted butter
125g sugar vanilla scented 
1 whole egg and yellow
1 pinch of salt
1 teaspoon baking powder
700g flour
jam
method:

In a bowl or a bowl, place the softened butter, salt, sugar and beat for a little light cream.
Add the egg and yolk and continue to beat a little to introduce eggs.
Add half the flour and baking powder and continue to slowly add the flour. (Note there is a flour that quickly absorbs fat and there are other non-flour).
Work the dough without letting the fridge, lightly floured work plan, and roll out the dough.
With a cookie cutter cut shapes to choose pairs half you holes.
A jacketed flat bake 150 ° to 180 ° for 20 minutes.
Let cool and put jam between two cookies.
Sprinkle with icing sugar.
http://www.gourmandisesassia.com/article-111615725.html