Coffee Recipe from 1950's recipe book

Here's a coffee drink from a 1950s electric blender recipe book I found ! Makes 2 tall ones:

1 ounce of unmelted unsweetened chocolate

1 cup of cold strong Dean's Beans Colombian coffee 

1 cup cold milk

1-1/2 teaspoons of sugar or stevia to taste

A few grains of salt

1/4 teaspoon cinnamon 

I cup chopped or cracked ice

Blend 30 seconds, top with whipped cream

This coffee drink will warm you up on the coldest days!!