Mouth-watering, buttery and tender, this is just a lovely morsel called crumb cake. It reminds you of New England inn's or your first coffee cake that made you so proud. Good then, it's still good now - a perfect recipe for new and veteran bakers. You can also rev it up with part whole-wheat flour and Greek yogurt (to replace the buttermilk). Everything in this recipe depends on using the best quality cinnamon so make an effort to procure the best!