I found this information on a cooking site, I hope it helps you. "Bean blossoms have a sweet, beany flavor. Nasturtiums have a wonderfully peppery flavor similar to watercress and their pickled buds can be substituted for more expensive capers. Borage tastes like cucumber, and miniature pansies (Johny-Jump-Ups) have a mild wintergreen taste.
Violets, roses and lavender lend a sweet flavor to salads or desserts. Bright yellow calendulas are an economic alternative to expensive saffron, though not quite as pungent. Other flowers may have a spicy or peppermint flavor.
I know of a commercial on TV before I lost my cable about Edible Flowers. It's a bouquette of flowers made intirely out of fruit and chocolate. And if that's not the answer you were looking for, then sorry for crowding your question. I might try one when I can afford it though, it sounds delicious!
This a quick list of edible flowers: pansy, nasturtiums, borage, roses, mustard flowers, squash flower, violets (viola odorata), and calendula (true calendula, not marigolds which are a tagetes species).