Stickiness in hard candy (2024)

Stickiness in hard candy (1)

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Anas Poozhikkuth Stickiness in hard candy (2)

Anas Poozhikkuth

Quality Control Technician at Walmart Canada

Published Jun 10, 2022

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With a modest increase in moisture, glass transition temperature (Tg )drops dramatically. If used a high DE glucose syrup, you'll end up with too many low molecular weight sugars, resulting in a sticky candy with a reduced glass transition temperature (Tg). 42DE is a commonly used glucose syrup for hard candy. Higher levels of glucose syrup in the recipe (50–60% dry basis) avoid sucrose crystallization but result in stickiness and less sweet candies.

The addition of more liquid flavor lowers the glass transition temperature (Tg), making candies more susceptible to changes during storage, resulting in graining, taste loss, and cold flow.

If there is more acid in hard candy, it will invert and become sticky. Check the acidity of the filling as well. Acids promote sucrose inversion, especially at high temperatures, and are added after cooking, along with flavorings. The sucrose inversion at high temperature and low pH produces glucose and fructose, resulting in unstable candies with lower glass transition temperature and more stickiness, , and graining (crystallization) and shorter shelf life. (Acids should be added as a powder.)

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To counteract potential inversion issues, buffer salts like sodium citrate can be employed.Bicarbonate and organic acids may be present in powdered centers to generate a fizzy effect when eaten. However, two components must be maintained separate, which is commonly accomplished by covering one of the products with a fat layer. If penetrated inside hard candy it might cause sucrose inversion and softening.

A hard candy with a higher percentage of invert sugar has a lower quality and has a shorter shelf life. Because of the greaterhygroscopicity and low glass transition temperature. Stickiness is common in candy with a high fructose content, weatherthrough direct addition or sucrose inversion.

For hard candy, a common target range of total DE is 16-18%. Concentrated hard candy has an equilibrium related humidity of 20-30%, Relative humidity more than 30%, hard candy will absorb moisture.

Because of the variation in moisture content between the center and the surface, water molecules in the surrounding can only permeate into the sugar glass. Water migration to the bulk of the sugar glass is very slower; sugar candy exposed to damp air can take up to a month to reach equilibrium in terms of moisture content across the candy. Because moisture migration to the interior is slower than water molecule absorption to the surface.

Sugar has a sticking point that is around 10 degrees Celsius higher than its glass transition temperature Tg value.

Other reasons are

Stickiness will result from a low cooking temperature.

Packing materials that aren't up to snuff.

In the processing area, there is more humidity.

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Carol Levy

sole employee at It's A Whimsy (r)

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I just wanted to find out what to do because hard candy I made is sticky. Very good article but, and I don't mean to be smart, I wasn't looking for a science lesson.

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Anas Poozhikkuth

Quality Control Technician at Walmart Canada

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References R. Lees. (n.d.). Sugar Confectionery and Chocolate Manufacture. Retrieved from https://books.google.ca/books/about/Sugar_Confectionery_and_Chocolate_Manufa.html?id=75zTBwAAQBAJ&source=kp_cover&redir_esc=yRichard W. Hartel, Joachim H. Von Elbe. (2017, October 17). CONFECTIONERY SCIENCE AND TECHNOLOGY. Retrieved from https://www.chapters.indigo.ca/en-ca/books/confectionery-science-and-technology/9783319617404-item.html

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Stickiness in hard candy (2024)

FAQs

Stickiness in hard candy? ›

Why is my hard candy soft and sticky? The simple answer is that there is too much moisture in your candy. One or more factors could be contributing to this problem. In hard candy making

candy making
Candy making or candymaking is the preparation and cookery of candies and sugar confections. Candy making includes the preparation of many various candies, such as hard candies, jelly beans, gumdrops, taffy, liquorice, cotton candy, chocolates and chocolate truffles, dragées, fudge, caramel candy, and toffee.
https://en.wikipedia.org › wiki › Candy_making
, it is important to cook all the water out of the sugar/corn syrup/water mixture.

What does cream of tartar do to hard candy? ›

Cream of tartar can prevent your homemade hard candy, caramel, and toffee from forming a gritty texture due to sugar crystallization. Adding a pinch of cream of tartar to your sugar syrup will help break down the sugar molecules and stop them from crystalizing early on.

Why is my candied fruit not hardening? ›

If your candied coating isn't hardening, the candying mixture did not reach a high enough temperature. Allow your candying mixture to cook until it bubbles, thickens, and turns a rich golden color, sort of like caramel. Then, quickly turn off the heat so it doesn't burn.

How do you test for hard crack candy? ›

Hard-Crack Stage

Drop a little of the molten syrup in cold water and it will form hard, brittle threads that break when bent. CAUTION: To avoid burns, allow the syrup to cool in the cold water for a few moments before touching it! Toffee, nut brittles, and lollipops are all cooked to the hard-crack stage.

Why is my hard candy still sticky? ›

Why is my hard candy soft and sticky? The simple answer is that there is too much moisture in your candy. One or more factors could be contributing to this problem. In hard candy making, it is important to cook all the water out of the sugar/corn syrup/water mixture.

What removes sticky candy? ›

Dip a clean rag or cloth in the vinegar and blot the affected fabric with the moistened cloth. Once it is fairly damp, let it sit for fifteen minutes. Rinse again and blot with a dry rag. If the sticky candy or remaining stain is still there, you can use an adhesive remove such as Goo Gone to try to remove it.

What does corn syrup do in hard candy? ›

Provides Smooth Texture: Corn syrup helps to create a smooth and glossy texture in candies, ensuring that they are not grainy or gritty.

What happens if you add too much cream of tartar? ›

“Too much cream of tartar will impart a metallic, tin-like taste,” Molly warns.

What does baking soda do in candy? ›

The Purpose of Baking Soda in Brittle Recipes

Not all brittle recipes have baking soda, but most do. Baking soda helps to neutralize the acidity in the candy, and in some cases makes it lighter.

Why isn't my rock candy hardening? ›

Why is my rock candy not hardening? If your candy doesn't harden, even after sitting for a long time (it should only take 45 minutes, not much longer), it might be that your liquid never got hot enough. It's important that the temperature reaches 300°F while cooking the syrup.

How do you make hard candy soft? ›

To speed that process along, leave the candy in a loosely covered container with a damp paper towel. If the candy is not wrapped, place a double sheet of plastic wrap between the damp towel and the candy. Change the damp towel every two to three days. It will still probably take a month or so for the candy to soften.

Why won't my candied strawberries harden? ›

If you candied strawberries are not hardening, there could be a number of reasons. You didn't cook your syrup to the correct temperature. You must hit 305F. The candy shell is too thick and taking longer to harden.

What is the hardest hard candy? ›

Jolly Ranchers are also the hardest of the hard candies—they're like concentrated and pressurized diamonds of fruity sugar.

How do you know when hard candy is ready? ›

If the candy forms thick threads when it drips from the spoon, it is in the hard ball stage or 250°—265°F. If you gather the candy mixture into a ball it will be a hard ball. Divinity or rock candy is typically cooked to this stage.

What happens when hard candy goes bad? ›

Texture Changes

Hard candies can become sticky or even soft, while chewy candies can harden over time. If your Skittles have morphed into tiny rocks or transformed into gooey blobs, they're past their prime.

How do you make caramel candy less sticky? ›

You can try cooking them a few degrees hotter if they are too soft. If the texture is good but they are too sticky, you an try more invert sugar and/or more butter.

How to keep hard candy clear? ›

The best way to keep the candy clear, but still reach the hard crack stage, is to cook the candy as quickly as possible. Low heat will not help you here--use high heat and do not stir the fluid after it begins boiling.

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