It's best to buy ground cinnamon in small quantities because the freshness and flavour quickly disappear. You can try to grind your own cinnamon from the bark but it's difficult to get it fine enough.
The humble coffee cake is perfect ... apple-studded sour cream cake and brown butter-walnut streusel, making for one perfect bite. Spices such as ground cardamom, cinnamon, allspice and cloves ...