For the Linzer cake, mix butter with eggs and sugar until creamy. Mix flour with baking powder, salt, cinnamon and grated lemon peel and add to butter-sugar-egg mixture. Mix everything well.
Set aside one third of the dough. Pour the remaining dough into a baking pan lined with baking paper or greased. Now spread the dough with currant jam. Pour the set aside dough into a piping bag and then pipe a lattice pattern on the dough.
Bake at 170 degrees top/bottom heat for about 35-40 minutes. When the cake has cooled, sprinkle with powdered sugar.