This passion fruit and lemon cake is a refreshing dessert that is perfect for a summer dinner party. The cake is made with a combination of all-purpose flour, baking powder, salt, sugar, eggs, butter, passion fruit puree, and lemon zest. The cake is moist and flavorful, with a tangy passion fruit flavor that is balanced by the bright citrus flavor of the lemon. The cake is easy to make and can be served with a dusting of powdered sugar or a drizzle of lemon glaze.