Well, finally, after much ado about something, I got her to write it down! This makes me so happy! This chocolate sauce is not like chocolate fudge... It's thinner and when warmed and poured over ice cream, it won't slip right off. Instead, it coats the ice cream with a beautiful chocolate netting. I like a scoop of double rainbow with buckets of sauce on top.
2 cups sugar
1 cup cocoa powder
1 cup milk
1/2 c corn syrup
2 tbsp butter
1 tbsp vanilla extract
Put the first four ingredients in a larger saucepan than you think you'll need - this has the propensity to boil over. Whisk constantly over medium high heat until it starts to simmer. Turn the heat to low. Leave simmering, uncovered. Do not touch again. Turn on an episode of Golden Girls. Watch to completion without fast forwarding through commercials.
30 minutes later your sauce is done cooking. Turn it off and take it off the heat. Stir in your butter and vanilla. Let cool for a bit. Bottoms up!