How to make the perfect coffee cake and the common mistakes to avoid

Old-fashioned coffee cake is hard to beat.
This is not the time to brew some freshly ground coffee. Even Darina reaches for coffee essence when making a coffee cake. "I’m a real purist about using extract rather than essence in the case of vanilla", she explains. "But, in coffee cake, I prefer to use coffee essence (which is actually mostly chicory) to real coffee."