sweet Mother Mary in a slice of toast, this is delicious

Coffee+Choco milk mix(for example: Hershey's or Carnation Instant Breakfast) = yum

Don't skip the sugar, though. It makes it sweet and wonderful.
Creamer and flavored syrup, like hazelnut or caramel, can be added for combos.
Sugar in the Raw is delicious on toppa the whipped cream.