For the cafe de olla ice cream, mix the heavy cream, milk, coffee, sugar, vanilla, and cinnamon in a mixing bowl. Freeze and churn according to your ice-cream maker’s instructions.
To make the hot fudge, while stirring, melt the butter and chocolate on low in a double boiler. (If you don't have a double boiler, keep a good eye on it so it doesn't burn.)
Once melted, stir in the sugar and the evaporated milk. While stirring, cook until the sugar has melted and the sauce is smooth. Serve warm over ice cream.
Cafe de olla ice cream with Mom’s hot fudge sauce | www.homesicktexan.com