What is the Sugar Chemistry of making Candy?

As with Proust’s famous madeleine, it is often sweets that become intertwined with memory, emotion and a sense of comfort. Dessert functions as a reward for "eating those vegetables," a miracle salve for that scraped knee, or even a mischievous child’s stolen secret. The acquisition of penny candy is often a child’s first foray into the world of commerce and finance. With sweetness we begin to associate comfort, pleasure, reward, envy, and guilt.

Piping chocolate for dessert

Personal nostalgia will vary by culture, country, region, or generation; our source material might be a freshly baked pie like Grandma used to make, or it may come in the form of mass produced junk food (I’m convinced that all pastry chefs have, consciously or not, tried to recreate a Snickers bar in some way or another). These associations remain through adulthood. Playing to this inner child, for a pastry chef, can initiate the creation of something new yet familiar. The context of such nostalgia—especially unexpected in a fine dining environment—heightens such playfulness.

The more I explore this notion, the more fascinating I find it and the more I enjoy tapping into those emotions. In other words, the true path to our inner selves may indeed be something as simple as candy. Though confections are tucked beneath the broad umbrella of pastry arts that includes chocolate, ice cream, cakes, and plated desserts, my own interest in candy has increased along with a better understanding of its underlying science. Through candy-making we can explore the properties of sugars and fats, the behavior of concentrated syrups and crystallization, and numerous complex interactions that influence taste and texture. 

Homemade passion fruit gummy worm

Passion fruit "gummy worm"

A historical survey of the candy trade reveals that, though there has been much innovation, the sweets crafted in the Middle Ages or in ancient Rome may not have seemed all that unfamiliar to us today. Once the cost of ingredients like sugar and chocolate decreased more than a century ago (in conjunction with technical leaps and bounds made during the Industrial Revolution), candy truly became accessible to all. Most of the brands we recognize today had their roots in this "candy renaissance." Though the world of confections includes many different styles, from hard candy to soft caramels and dense nougats to fluffy marshmallows, here are some simple guidelines that I believe will help all cooks—the amateur and pro alike—achieve sweet success:

Brush up on your basics. 

Most candies tend to conform to tried and true formulas, but that shouldn't prevent us from creating unique versions of the classics. With just a little bit of research, we can easily begin to grasp the physics and chemistry at play, which eventually allows us to experiment with whimsy.

Campari - grapefruit pate de fruit

Controlling crystallization, for example, is very important. Understanding just when to stir a sugar syrup (or when not to) and when to use inhibitors like acids and glucose will help provide the right end result. Simple knowledge of basic hydrocolloids can help us craft a range of textures like chewy gummies, melt-in-your-mouth pâtes de fruits and ultra-light marshmallows.

 

Navigating the complex flavor-creating mechanisms of caramelization and Maillard reactions help us understand what is happening as our cooked confections transform into something greater than the sum of their parts. My own recent explorations have resulted in tooth-friendly sugar-free candies for a private client and "savory" confections flavored with vegetable juices, such as carrot. With just a little confidence, patience, and know-how, the sky is the limit!

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