3 jam filled thumbprint Recipes

butter, room temperature, sugar, salt, vanilla, milk, cornstarch, all-purpose flour, jam , to fill

jam filling, seedless strawberry jam, limoncello liqueur, cookies, flour, baking powder, salt, butter, room temperature, white sugar, egg yolks (yolks only !), grated lemon zest, fresh lemon juice, lemon extract, vanilla extract, chopped pecans or walnuts, optional, powdered sugar , for dusting the tops of the cookies after baking