My husband adds it to his coffee every morning for his version of Cafe Mocha. If we're out of cocoa mix, he doesn't have any coffee (or he goes to Starbucks - but I think he just goes there to flirt with the coffee girls).
I have fiddled around with different substitutions, like Splenda for part or all of the sugar, and sugar-free Quik instead of regular Quik, and the result is 'adequate', but my husband always goes back to the original recipe.
Grandma's Cocoa Mix
5-3/4c dry powdered milk
1c powdered creamer (I use fat-free)
2c powdered chocolate drink mix (like Quik)
2-3T baking cocoa powder
Mix all ingredients together in a large bowl, and store in tightly lidded container. Makes about 10c mix, or about 40 servings.
Use 1/4c mix to 6-8oz hot water (or coffee) to make hot cocoa (Cafe Mocha).
photo credit: ikkoskinen