In brief
King Arthur Baking's No-Fuss Coffee Cake uses cinnamon and sour cream with toppings. The name coffee cake does not establish coffee as an ingredient.
Useful to know
King Arthur Baking's No-Fuss Coffee Cake uses cinnamon and sour cream with toppings. The name coffee cake does not establish coffee as an ingredient. [1]
Check the actual formula rather than interpreting the name as a flavour. This recipe also permits advance preparation, but that is its particular option rather than a rule for every cake sharing the name.
Sources
For further detail and to check the information: