I have had a latte machine for a couple of years. I have tried every concoction I can think of. My best yet is my mocha or as I call it the "Blazen Mocha". Blazen was my derby name. It's not your typical chocolate milk with coffee though. I had to experiment a lot to find the perfect one.
* 2 tsp mini chocolate chips
* 2 tsp white chocolate chips
* 1-2 Tbsp milk
Microwave for 20 seconds and mix well together until all is melted and looks like a super rich chocolate milk.
Using my latte machine...
I mix the base with 8 oz. milk and 1 Tbsp of unsweet cocoa. I eye everything so measurements are approximate.
This is made with one shot of espresso. So if you don't have a latte machine just make about 2-4 oz of super strong coffee.
Last is I add a couple of dashes of cinnamon. Stir well. Maybe that's what makes it the Blazen Mocha.
* Replace cinnamon with a tsp of mint extract for a mint mocha.