For the rhubarb cake beat butter and sugar until fluffy gradually stir in flour, baking powder, a little salt, eggs, juice and lemon zest. Finally add the milk.
Pour the dough into a greased mold and smooth it out.
Mix the sliced rhubarb, cinnamon and sugar and spread it on the dough. Bake the rhubarb cake for 40-45 minutes at 160 degrees.
Preparation Tip:
Sprinkle the rhubarb cake with powdered sugar and, if desired, with pistachios.