Williams Sonoma sells hot chocolate mix which is essentially shaved chocolate you melt in hot milk. It makes for a thick hot chocolate. Use less chocolate, refrigerate, and froth it before drinking to lighten it up a bit. That should be yummy albeit high calorie.
When my daughter was there (as a child), she would order hot cocoa for breakfast. It was so thick, a spoon would stand in it (like pudding). She thought she was in heaven. 😉
Real Parisian hot chocolate, made with whole milk and chopped bittersweet chocolate, is rich and thick. No thickeners needed but some freshly whipped cream is welcome!
I use Fairlife skim or 2% and chocolate vital protein collagen peptides to make a delicious not too sweet hot cocoa. Fairlife milk is richer/creamier than regular milk IMO.
I use t stick milk frother to blend it.
That may work for you.
Anyone hade a tried & true recipe for chocolates milk? Cornstarch maybe?
My teens like it once a day but don’t like all the thickeners in store bought (even TJ’s & South Mountain have carrageenan which is linked to “stuff” long term)
I use whole milk & chocolate syrup but it lacks the mouthfeel of store bought.