Probably the most famous things made at Jaarsma Bakery are Dutch letters – giant-size pastries in the form of the alphabet. They’re swell, and no one should visit Pella without eating at least a monogram; but Dutch letters are only a hint of the glories to be found on Jaarsma’s shelves. To the left as you enter are racks of sunny-yellow angelfood cakes made into circles and loaves. To the right are cases filled with dozens of beautiful pastries, many with such enchanting names as krackelings, goat’s legs, almond bankets, and figure 8s.