Coffee Walnut Cake

Ingredients

For the cake:

2 mugs of self-rising flour
1 mug soft brown sugar
2 tablespoons fine coffee powder
1/2 mug sunflower oil
3/4 mug rice milk or Soy milk (rice milk makes it lighter)

For the icing:

2.5 cups powered sugar
4 Tablespoons vegan butter or margarine
4 Tablespoons non-dairy milk flavored with coffee powder to taste
walnuts, chopped