Science of Cooking: Candy-making Stages | Exploratorium (2024)

Science of Cooking: Candy-making Stages | Exploratorium (1)

As a sugar syrup is cooked, water boils away, the sugar concentration increases, and the temperature rises. The highest temperature that the sugar syrup reaches tells you what the syrup will be like when it cools. In fact, that’s how each of the temperature stages discussed below is named.

For example, at 235° F, the syrup is at the “soft-ball” stage. That means that when you drop a bit of it into cold water to cool it down, it will form a soft ball.

Most candy recipes will tell you to boil your sugar mixture until it reaches one of the stages below. For the best results and most accuracy, we recommend that you use both a candy thermometer and the cold water test. It's also a good idea to test your thermometer's accuracy by placing it in plain boiling water. At sea level, it should read 212° F. If it reads above or below this number, make the necessary adjustments when cooking your candy syrup.

Note: The temperatures specified here are for sea level. At higher altitudes, subtract 1° F from every listed temperature for each 500 feet above sea level.

For a temperature conversion calculator, visit our recipe conversions page.

Thread Stage
230° F–235° F
sugar concentration: 80%

At this relatively low temperature, there is still a lot of water left in the syrup. When you drop a little of this syrup into cold water to cool, it forms a liquid thread that will not ball up.

Cooking sugar syrup to this stage gives you not candy, but syrup—something you might make to pour over ice cream.

1. Soft-Ball Stage
235° F–240° F
sugar concentration: 85%

At this temperature, sugar syrup dropped into cold water will form a soft, flexible ball. If you remove the ball from water, it will flatten like a pancake after a few moments in your hand.

Fudge, pralines, and fondant are made by cooking ingredients to the soft-ball stage.

Science of Cooking: Candy-making Stages | Exploratorium (2)
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2. Firm-Ball Stage
245° F–250° F
sugar concentration: 87%

Drop a little of this syrup in cold water and it will form a firm ball, one that won’t flatten when you take it out of the water, but remains malleable and will flatten when squeezed.

Caramels are cooked to the firm-ball stage.

3. Hard-Ball Stage
250° F–265° F
sugar concentration: 92%

At this stage, the syrup will form thick, "ropy" threads as it drips from the spoon. The sugar concentration is rather high now, which means there’s less and less moisture in the sugar syrup. A little of this syrup dropped into cold water will form a hard ball. If you take the ball out of the water, it won’t flatten. The ball will be hard, but you can still change its shape by squashing it.

Nougat, marshmallows, gummies, divinity, and rock candy are cooked to the hard-ball stage.

4. Soft-Crack Stage
270° F–290° F
sugar concentration: 95%

As the syrup reached soft-crack stage, the bubbles on top will become smaller, thicker, and closer together. At this stage, the moisture content is low. When you drop a bit of this syrup into cold water, it will solidify into threads that, when removed from the water, are flexible, not brittle. They will bend slightly before breaking.

Saltwater taffy and butterscotch are cooked to the soft-crack stage.

5. Hard-Crack Stage
300° F–310° F
Sugar concentration: 99%

The hard-crack stage is the highest temperature you are likely to see specified in a candy recipe. At these temperatures, there is almost no water left in the syrup. 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.

Caramelizing Sugar

If you heat a sugar syrup to temperatures higher than any of the candy stages, you will be on your way to creating caramelized sugar (the brown liquid stage)—a rich addition to many desserts.

Clear-Liquid Stage
320° F
sugar concentration: 100%

At this temperature all the water has boiled away. The remaining sugar is liquid and light amber in color.

Brown-Liquid Stage
338° F
sugar concentration: 100%

Now the liquefied sugar turns brown in color due to carmelization. The sugar is beginning to break down and form many complex compounds that contribute to a richer flavor.

Caramelized sugar is used for dessert decorations and can also be used to give a candy coating to nuts.

Burnt-Sugar Stage
350° F
sugar concentration: 100%

Watch out! Above about 350° F, the sugar begins to burn and develops a bitter, burnt taste.

Science of Cooking: Candy-making Stages | Exploratorium (2024)

FAQs

What are the stages in candy making? ›

There are seven stages of candy making: thread, soft-ball, firm-ball, hard-ball, soft-crack, hard-crack, and caramel. Different types of candy, from fudge to lollipops, need to be cooked to different stages to get the desired results.

What is the science behind candy making? ›

In general, candy is made by dissolving sugar into water to create a solution. Granulated sugar, the most common type used in candy-making, is sucrose, a disaccharide molecule made up of glucose and fructose. When you force these two molecules to break apart, a very tasty reaction occurs: caramelization.

What are the different stages of sugar doneness in sugar cooking explain each stage? ›

Cooked Sugar Stages (Fahrenheit/Celsius)
StageFahrenheit (degrees F)Celsius (degrees C)
Thread223-234 degrees F106-112 degrees C
Soft Ball234-240 degrees F112-115 degrees C
Firm Ball242-248 degrees F116-120 degrees C
Hard Ball250-266 degrees F122-130 degrees C
4 more rows

How many stages does candy have? ›

There are currently 12,320 total levels in 822 episodes on the HTML5 (mobile) version of Candy Crush Saga, with 90 additional levels on the Windows 10 App. Some players have even more levels they can try out though, due to the constant play-testing Candy Crush periodically does in the game.

What is the biggest factor in candy making? ›

Sucrose is a very unique molecule. It is the key to making candy of all different types. Soft, hard, brittle, chewy. The interaction of sucrose with water is key for all of them!

Is candy making a chemical reaction? ›

When making glass candy, gummies, or marshmallows, the syrup is cooled down so quickly that no crystals can form at all. Making candies is actually chemistry in action. You manipulate the size of sugar crystals—even if you cannot see them—to produce an array of textures.

What are the two main factors involved in the varied textures of candy? ›

The two main factors involved in making varied textures of candy are:
  • The length of time allowed for crystal growth (long time, large crystals; short time, small crystals) and.
  • The processing of the syrup as it cools (allow to set, large crystals; stir, small crystals; spin, no crystals).

Why does candy dissolve faster in water than vinegar? ›

In fact, candy might dissolve more slowly in vinegar, since the acetic acid molecules don't dissolve sugar as well as water does. Although your stomach does contain acid, it plays less of a role in digestion than you might think. Acids don't break up components in your food like carbohydrates (such as sugar) or fats.

What are the 5 steps in cooking? ›

The aim is to make the 5 steps of cooking – preserving, preparing, cooking, dishing up and washing up – straightforward and consequential.

What are the 6 functions of sugar in baking? ›

However, sugar is a versatile ingredient and contributes many functional properties to food products.
  • Flavour Balance. ...
  • Preservation. ...
  • Texture and Mouthfeel. ...
  • Volume. ...
  • Colour. ...
  • Taste. ...
  • Challenges in Sugar Replacement and Reformulation.

What are the 5 functions of sugar in baking? ›

Sugar functions in baking as:

Creaming & tenderizing agent: works as an aerator in batter systems. Shelf-life improver: by binding free water and reducing water activity (natural preservative) Freeze-point depression. Texturizer: as a mouthfeel improver.

How do you know if candy is at hard-crack stage? ›

The hard-crack stage is the highest temperature you are likely to see specified in a candy recipe. At these temperatures, there is almost no water left in the syrup. Drop a little of the molten syrup in cold water and it will form hard, brittle threads that break when bent.

At what stage does sugar caramelize? ›

Caramelization is what happens to pure sugar when it reaches 338° F. A few tablespoons of sugar put in a pan and heated will eventually melt and, at 338° F, start to turn brown. At this temperature, the sugar compounds begin to break down and new compounds form.

What is the final stage in the sugar making process? ›

The last step produces a small stream of remaining syrup called cane mill molasses containing up to 55% (wt.) sucrose and substantial amounts of invert sugar (glucose/fructose mixture) impurities.

Is there any skill to Candy Crush? ›

Candy Crush is a game of skill. The specific skills required of the user are relatively straightforward in principle, but difficult to implement in practice.

How many stages is Candy Crush? ›

There are 12,500 levels, on Android, iOS, Amazon devices and Facebook versions of the game. You can keep up to date with the number of levels there are, through King's forums. Note that the Windows 10 version has additional 90 levels for a while now.

What is the most common problem when making candy? ›

The 7 Deadly Sins of Candy Making
  • Making Candy on a Humid Day. It's best to make candy on a cool, dry day. ...
  • Using the Wrong Pan. ...
  • Using the Wrong Spoon. ...
  • Not Using a Candy Thermometer. ...
  • Not Controlling the Crystals. ...
  • Scraping the Saucepan. ...
  • Combining Chocolate and Water.
Nov 16, 2010

How does temperature affect candy making? ›

As a rule of thumb, only make candy when the weather is cool and dry, as the candy will cool faster and reduce the likelihood of crystal formation. Remember, high-humidity days can occur during the winter as well as summer.

Why is temperature important in candy making? ›

temperature that the sugar syrup reaches tells you what the syrup will be like when it cools.

What is the science behind boiling sugar? ›

Cooking Sugar

Boiling a mixture of sugar and water does more than simply allow larger volumes of sucrose to dissolve in water. As the temperature of the sugar solution rises, water evaporates and leaves behind the sugar in its molten form. This creates a very concentrated sugar solution.

Is melting candy physical or chemical change? ›

Melting of chocolate: While eating chocolate, the chocolate melts in the mouth. The reason for this is that the chocolate melts from a solid to a liquid state without undergoing any change in its chemical composition. There is no formation of a new chemical substance which makes it a physical change.

What are 5 examples of a chemical reaction? ›

Some chemical change examples in our everyday life are mentioned below.
  • Burning of paper and log of wood.
  • Digestion of food.
  • Boiling an egg.
  • Chemical battery usage.
  • Electroplating a metal.
  • Baking a cake.
  • Milk going sour.
  • Various metabolic reactions that take place in the cells.

What humidity is good for candy making? ›

That's part of the reason why candy making is so popular in winter; the best climate for making candy has a relative humidity of less than 35%, and cold air usually has less moisture than hot air.

How do you keep sugar from crystallizing when making candy? ›

Add a little acid (such as a touch of lemon juice) or corn syrup to the sugar-water mixture before cooking; they help interfere with crystallization.

What temperature does sugar crystallize? ›

Supersaturation between 70° and 90°C is the most favorable for crystal formation in a sucrose solution cooked to 112°C. When the syrup is swirled at these temperatures, crystallization takes place in a relatively short period, but the crystals generated are bigger than when the syrup is cooled to a lower temperature.

Which will make the candy dissolve the fastest? ›

As you will see, the candy canes in the hot water will dissolve the fastest. The reason hot water dissolves more is due to the fact that it has faster molecules which are spread further apart than the molecules in cold water, oil, or vinegar.

What liquid dissolves sugar the fastest? ›

  • Sugar dissolves faster in hot water than in cold water because hot water has more energy than cold water.
  • When the temperature of water rises, its molecules gain energy and move faster. ...
  • Hence, sugar dissolves faster in hot water.

Which type of water will cause the sugar to dissolve more quickly? ›

Why do you think sugar dissolves better in hot water than in cold water? The reason why sugar dissolves at a faster rate in hot water has to do with increased molecular motion. The added energy in the hot water causes water molecules to move faster and sucrose molecules to vibrate faster.

How do you know when candy is at hard ball stage? ›

To determine whether your sugar syrup has reached the hard-ball stage, drop a spoonful of syrup into very cold water. Reach into the water to form the syrup into a ball. If it forms and holds its shape as a ball, retaining most of its shape as you press it, you've reached the hard-ball stage.

How can you tell if candy is at hard ball stage? ›

Hard-Ball Stage

At this stage, the syrup will form thick, "ropy" threads as it drips from the spoon. The sugar concentration is rather high now, which means there's less and less moisture in the sugar syrup. A little of this syrup dropped into cold water will form a hard ball.

What is crack stage for candy? ›

Finally, if the candy forms hard, brittle strands that easily break, the candy is at the hard crack stage, between 300°F-310°F. Butter toffee and peanut brittle are examples of candies cooked to this temperature.

What is the thread stage of candy? ›

Thread Stage (223 to 235 F)

The earliest candy temperature stage is the thread stage. At this temperature, the syrup drips from a spoon and forms thin threads in cold water. Syrup at the thread stage is perfect for candied fruits.

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