Recipe(tried): Walnut Cake /w mocha butter icing

This is one my mother-in-law's specials. since i haven't had the time to cook lately, she has been busy in the kitchen. she made this cake yesterday as i have been asking her many times. boy, was it delichious! she told me it's a Filipinos version. i must say it's different from the birtish style i used to have in australia.
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Walnut Cake
90g shortening 300g castor sugar
100g whole eggs
225g cake flour
1 tsp baking soda
1 tsp baking powder
1 tsp salt
3 tbsp instant coffee
120g evaporated milk
3 tbsp lime juice
1/2 cup water
1 tsp vanilla
3/4 cup chopped walnuts
preheat oven to 350 F (about 176 C)
Method:
CREAM shortening and sugar until light and fluffy. Add eggs in two stages. Sift dry ingredients and add in three stages alternately with liquid. Begin with flour and end with flour. Mix milk and kasturi juice.

Add water. Use this mixture alternately with flour. Add vanilla and chopped nuts. Pour into greased and paper-lined pan. Bake for 45 minutes or until done. When cool, ice with mocha butter icing.

Ingredients for mocha butter icing

225g butter
5gm instant coffee
158g sugar
1 tsp vanilla
3/4 cup evaporated milk
walnuts for topping and filling