From tender muffins and glazed cupcakes to spiced loaves and deeply chocolaty cakes, these zucchini desserts turn summer’s most versatile veggie into bakery-worthy treats to enjoy all season.

This time of year, the What's Cookin' mailbag is overflowing with requests on how to prepare that marvelous summer squash, zucchini. As Elizabeth Barrett Browning so beautifully wrote, "How do I love ...