I know, it sounds weird, right? It sounded really strange to me when I first married Brian and he suggested this and presented me with the recipe. I think the problem is calling it "gravy", gravy to me is savory, not sweet. It is actually like homeade chocolate pudding that hasn't been chilled. As a matter of fact, if you chill the leftovers, they become chocolate pudding.
We used homeade biscuits, but you could just as easily pop open a can....
1 cup of sugar
1/4 cup of flour
dash of salt
3TBL cocoa powder
2 cups milk
2 TBL butter (real butter, not margarine)
In saucepan mix dry ingredients until combined.
Add milk stirring continuously until smooth.
Heat over low to medium-low stirring continuously until mixture thickens, being very careful not to let it scorch (that part is why I leave the making of this to Brian). Brian guesstimates it takes between 5-10 minutes depending on the heat of your stove. Use some kind of implement that has a flat edge that will get into all the corners of your pan.
Once it has thickened add the butter and vanilla, stirring until melted through.
The sauce will continue to thicken as it stands.