choclate pudding

I found a Chocolate Pudding recipe in a cookbook I browsed through at Hastings. I modified this recipe to:

1/4 cup sugar
1/6 cup cocoa
1.5 tablespoons flour (I didn't have any corn starch)
1 cup 2% milk (I didn't have any regular milk or light cream)
1/4 cup chocolate chips (actually I put in a handful of dark
chocolate chips)
½ teaspoon vanilla extract (I actually "measured" this by eye
and don't know how much went in...

I mixed the solid ingredients and added half the milk. Whilst whisking briskly, I warmed this mixture on the stove and finally added the rest of the milk. When it started boiling, I poured in the chocolate chips and stirred well, letting the pudding cook for a minute or so. Then, it was let the pudding cool off.

It is a somewhat bitter pudding and not like the commercial (mix) version. I suspect it'll be an acquired taste...