How to Make Cupcakes from Scratch / Cupcake Recipe

Chocolate cupcakes recipes;
1/2 cup soften  butter
1 .cup sugar
1 egg-room tam.
1 teaspoon vanilla extract
1.1/2 cup flour
1/2 cup baking cocoa
1/2 tea spoon baking soda
pinch of salt
1/2 cup water
1/2 cup buttermilk

Frosting;
2.oz of butter
5 table spoon of condensed milk
4.oz of cream cheese
8.oz of cool whip