Navtej Kohli shares a 45 minutes start to finish recipe which is great for drop-in company. Happy baking!
Ingredients

2 cups white sugar
1 cup butter
1/2 cup cocoa powder
1 teaspoon vanilla extract
4 eggs
1 1/2 cups all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon salt
1/2 cup walnut halves

Method 

Melt the butter or margarine and mix all ingredients in the order given.
Bake [...]