My Mum's Orange Cake

3 eggs
1 cup sugar
vanilla
rind of 1 orange
1/4 cup oil
3 tablespoons sour cream or yogurt
Whisk all the above together
Add to the wet ingredients:

How to make it :

2 cups flour
3 tsp baking powder
juice of one orange
Continue to whisk these last ingredients and then pour into
a greased and floured pan and bake in preheated 350 oven for 25-40 mins
depending on oven.