Aunty Kay's Kumara Cake

1 cup wholemeal flour
1 cup flour
2 cups coarse brown sugar
2 tsp baking soda
½ tsp salt
2 tsp ground cinnamon
1 cup cooking oil
4 eggs
3 cups grated beauregard kumara

Icing

150g cream cheese
100g butter
2 cups Icing sugar
2 tsp vanilla extract
1 round tsp ground cinnamon
1 tsp grated lemon rind.

Sift and mix dry ingredients. Add oil, stir well, stir in eggs, and add kumara mix.

Bake 180ºC for one hour.

Make the icing by beating the butter and cream cheese until light and fluffy. Beat in the icing sugar. Add vanilla extract and lemon zest. 
Ice cake once cooled.