Add 1 heaping Tbsp. cocoa powder, 1 - 2 Tbsp. corn starch (depending upon how thick you want it to be) and 2 Tbsp. powdered sugar to powder of a chocolate pudding mix.
Subtract 1/2 cup milk from the box recipe and add black coffee in its place. Add a little vanilla. (or almond flavor if you like) Mix well with wand mixer or beater.
Bring to a boil over medium heat, stirring constantly with a spatula from the bottom. The pudding will get glossy and thick.
This is wonderful served warm with whipped cream.
It's also an excellent filler for a layer cake. Pipe frosting around the top of the bottom layer, let set a little and fill with pudding. Add the top layer and secure with toothpicks until it sets.
If you put the pudding into a loaf pan and stand cookies up in it before it cools, after a while the cookies will soften to a cakelike texture, and you'll have something similar to an old fashioned ice box cake : )
Very simple dessert that can be served with elegance.