Here's a recipe I put together instead from time to time. It makes a decent quantity for a lot less dinero. And, you can make those fabulous ice cream sundaes when finances allow.
1 c sugar
1/4 c cocoa
1 tab. butter
5 oz. can of evaporated milk
1/2 tsp. vanilla
Combine sugar and cocoa in saucepan until warm. This is tricky because it can burn easily.
When it gets a bit hotter, but not melting, add butter. Stir. Add evaporated milk.
Let mixture boil for 1 minute. Be sure to stir frequently.
Remove from heat and stir in vanilla. Serve immediately.