Preventing Sugar Crystals in Simple Syrup | Cook's Illustrated (2024)

Simple syrup crystallizes when enough of the sugar molecules stick to one another that they become insoluble in the water. In a syrup prepared with a high 2:1 ratio of sugar to water (often referred to as a rich syrup), the chance of sugar molecules clustering and crystallizing is high.

We made three batches of rich syrup by bringing 2 cups of sugar and 1 cup of water to a boil, and then we added ingredients that allegedly prevent crystallization—1/4 teaspoon of lemon juice and 1/4 teaspoon of cream of tartar—to two batches, respectively, and left the third alone. Within 24 hours we saw crystals in the control. The additives bought us more time, but after 48 hours crystals still began to appear. Adding these ingredients in larger amounts helped, but they changed the flavor profile too much.

To find a more effective solution, we had to understand why these additives helped. The cream of tartar and lemon juice are both acids that are able to break down sugar molecules into glucose and fructose in a process called inversion. So not only were fewer sugar molecules available to cluster together in our doctored syrups but the newly present glucose and fructose were physically blocking the remaining sugar molecules from one another.

So we just needed a way to invert enough of the sugar without changing the flavor. After some research, we landed on prolonged exposure to heat. Simmering the syrup for 10 minutes, instead of merely bringing it to a boil, inverted enough of the sugar without affecting flavor.

Here's our method: Bring 2 cups of granulated sugar and 1 cup of water to a simmer in a medium saucepan. Continue to simmer the syrup, covered, for 10 minutes, and then let it cool completely. The syrup can be refrigerated for at least two weeks without crystallization.

Preventing Sugar Crystals in Simple Syrup | Cook's Illustrated (2024)

FAQs

How do you keep simple syrup from crystallizing? ›

Using distilled water will help the simple syrup not crystallize since minerals and impurities can trigger the sweetener to do so. It's not necessary to use distilled water, but if you find crystals in your simple syrup later, this can be a good thing to try.

What are four interfering agents used to prevent crystal formation in candies? ›

Corn syrup, honey, molasses, cream and butter are all "interfering agents." That is, they interfere with crystallization of sucrose.

How do you keep monk fruit simple syrup from crystallizing? ›

Simple syrup made from Monkfruit has a tendency to crystallize quickly. To prevent this, add the tinniest pinch of xanthan gum.

What causes sugar to crystallize? ›

Once the saturated solution starts to cool down, it becomes supersaturated. A supersaturated solution is unstable—it contains more solute (in this case, sugar) than can stay in solution—so as the temperature decreases, the sugar comes out of the solution, forming crystals.

How do you make syrup without crystals? ›

Here's our method: Bring 2 cups of granulated sugar and 1 cup of water to a simmer in a medium saucepan. Continue to simmer the syrup, covered, for 10 minutes, and then let it cool completely. The syrup can be refrigerated for at least two weeks without crystallization.

Which of following is used to prevent crystallization in syrup? ›

Crystallization may be prevented by adding an interferent, such as acid (lemon, vinegar, tartaric, etc.) or glucose or corn syrup, during the boiling procedure.

How do you keep sugar from crystallizing? ›

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 can be done to avoid the formation of crystals? ›

Crystal formation upon dehydration can be avoided by forming a glass. Glasses are amorphous, and form by a continuous process (no interface or solidification front is involved).

What 3 ingredients can help interfere with crystallization? ›

Crystallization may be prevented by adding an interferent, such as acid (lemon, vinegar, tartaric, etc.) or glucose or corn syrup, during the boiling procedure.

What to add to simple syrup to preserve it? ›

Simple syrup can be preserved for months by adding 1 ounce of sodium benzoate with ¼ ounce of citric acid, per gallon of simple syrup. Each ingredient must be added separately and stirred into the syrup separately and thoroughly.

How do you get monk fruit sugar to dissolve? ›

When making a glaze using Lakanto Powdered Monkfruit Sweetener, add the ingredients to a microwave-safe bowl and microwave for 15 seconds to make sure the sweetener dissolves completely.

Why is monk fruit always mixed with erythritol? ›

During the production of monk fruit sweeteners, monk fruit extract is often blended with erythritol in order to taste and look more like table sugar. Erythritol is a type of polyol, also referred to as a sugar alcohol, that contains zero calories per gram.

Can sugar crystals be reversed? ›

Crystallisation is a physical process and can be reversed. Hence option (a) is the correct answer.

What is the factor affecting crystallization? ›

The crystallization process affected by physical conditions of the solution, solution solubility, the presence of impurities, nucleation, solution saturation and degree of super saturation, crystal growth, including solution composition, pH and temperature, and to date is not fully understood.

What temperature does sugar syrup 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.

How do you stabilize syrup? ›

Increase the sugar level - Higher sugar levels reduce water availability to microorganisms. Bring your sugar level (brix) up to at least 50. That means equal parts sugar and water by weight (not by volume). Add alcohol – 15% or so of alcohol helps work as a preservative environment; the higher the better.

Why do you not stir sugar syrup? ›

Avoid stirring the sugar if at all possible once you put it on the stove. Agitation can cause the sugar to crystallize.

How do you caramelize sugar without crystallizing it? ›

There are two common approaches to preventing crystallization:
  1. Add an acidic ingredient such as lemon juice to the sugar. ...
  2. Our preferred method: Replace some of the sugar with corn syrup.
Mar 14, 2018

Which two of the following are common methods to inhibit sugar crystallization? ›

What two methods are used to inhibit crystallization? - Creating very concentrated sugar solutions. - and/or adding large amounts of interfering agents to block the sugar molecules from clustering together.

Does citric acid prevent crystallization? ›

Like all acids, citric acid will act as a “doctor” when cooked with sugar, preventing crystallization. This process, which breaks down sucrose into fructose and glucose, is critical to candy-making, but must be carefully controlled or your candy will be sticky and brown at a lower temperature.

What sugar resists crystallization? ›

Invert sugar is a super sweet, edible mixture of two simple sugars (glucose and fructose). It is made by heating sucrose with water to break it into glucose and fructose. Invert sugar has a syrupy consistency that resists crystallization and promotes moisture retention.

Why is my sugar crystallizing instead of melting? ›

Crystallisation can be caused by stirring, or a grain of something other than sugar getting into the pan, or often just bad luck. The good news is that adding a little acid, such as lemon juice or cream of tartar, helps it stay fluid.

How does invert sugar prevent crystallization? ›

Why? Remember invert sugars contain glucose and fructose. Sucrose has a harder time crystallizing when glucose and fructose are floating around in the saucepan because glucose and fructose prevent the sucrose molecules from piling up on each other and crystallizing.

How does temperature affect sugar crystallization? ›

Answer 1: The higher the temperature, the more easily sugar dissolves in water, and so existing sugar crystals will dissolve. At lower temperature, they will precipitate.

What are the common methods used to reduce solubility in crystallization? ›

Step 3: Reduce Solubility via Crystallization Methods of Cooling, Antisolvent Addition, Evaporation or Reaction (Precipitation) Crystallization generally occurs by reducing the solubility of a solute in a solution by one or a combination of these four methods.

What are 5 factors that affect crystal formation? ›

The influences of the following factors on crystal habit were investigated:
  • Temperature of pure aqueous solutions.
  • Presence of inorganic compounds in solution.
  • Presence of organic compounds in solution.
  • Presence of thickening substances.
  • Presence of suspensions.
Jul 2, 2018

Which ingredient is added to prevent crystallization of sugar in syrup? ›

Any sugar crystals remaining in the syrup can cause others to crystallize. Adding a little corn syrup or an acid such as citrus juice will help to prevent this. Selecting a syrup recipe that includes a little brown sugar gives pancake syrup a warm color and the acid in brown sugar helps to prevent crystallization.

Which factors affect crystallization most? ›

Temperature is known to alter the solubility of the solute and evaporation rate of the solvent(s), thereby, affecting supersaturation which is essential for crystallization to occur.

What is the best preservative for syrup? ›

Among the preservatives commonly used in syrups with the usually effective concentrations are benzoic acid 0.1-0.2%, sodium benzoate 0.1-0.2% and various combinations of methylparabens, propylparabens and butylparabens.

How much vodka to preserve simple syrup? ›

Alcohol can help preserve the mixture and extend its shelf life. Add a neutral spirit, like vodka, to bring your syrup's alcohol-by-volume (abv) up to about 15% to create a syrup that will last at least a few months. This equates to 5 fluid ounces, or a little more than ½ cup of alcohol, for one quart of syrup.

How long does simple syrup last in Mason jar? ›

Does Simple Syrup Go Bad Over Time? One of the great things about simple syrup is that it has a long shelf life. If you store it properly, in a clean, airtight container, it will last for up to a month.

How do you prevent crystallization of erythritol? ›

Crystallization in simple syrup happens when erythritol recrystallizes under certain circ*mstances.
...
Recipe Notes:
  1. Don't place the jar of simple syrup in a fridge or else it will crystallize. ...
  2. Using distilled water will help the simple syrup not crystallize since minerals and impurities can trigger the sweetener to do so.
Dec 15, 2021

Does monk fruit sugar dissolve in cold water? ›

If using the recommended Lakanto Powdered Monk Fruit Sweetener, you can get away without mixing it into warm water to form a simple syrup. This is mostly used when adding granulated sweeteners or the electrolytes. The powdered sweeteners will usually dissolve right into the cold water.

What is a replacement for erythritol? ›

The best erythritol substitute would be one of the granular blends in the table below (e.g., Swerve, Pyure Organic Stevia All-Purpose Blend, Lakanto Monkfruit Sugar Substitute, Trim Healthy Mama Sweet Blend). They tend to be much easier to find and taste a bit better than pure erythritol.

Is monk fruit sweetener hard on the liver? ›

Sustained Weight Loss and a Healthier Liver

Studies show that adding monk fruit to your diet can also help treat non alcoholic fatty liver disease (NAFLD) (1). Non alcoholic fatty liver disease is very common and causes serious metabolic diseases. Health has never tasted sweeter!

Can you grow monk fruit in the United States? ›

Monk fruit is not grown in the United States. Monk fruit is native to southern China and northern Thailand and is grown primarily in the mountains near Guilin, China, in the province of Guangxi.

Why is lemon juice added to sugar syrup? ›

Lemon juice is added to sugar syrup because the juice is acidic and is breaks down sugar molecules into glucose and fructose in a process called inversion. This results in fewer sugar molecules available to cluster together and form crystals in the syrup.

What methods can be used to preserve a syrup? ›

Syrup Preservation Tips
  • Increase the sugar level - Higher sugar levels reduce water availability to microorganisms. ...
  • Add alcohol – 15% or so of alcohol helps work as a preservative environment; the higher the better. ...
  • Strain syrups well – hom*ogeneous environments are best.

Should there be less water then sugar making a syrup? ›

You only need two ingredients for your basic simple syrup recipe: water and sugar. The most common ratio for simple syrup is equal parts water to sugar. However, this doesn't mean that you couldn't make the syrup richer by using more sugar or leaner by using less sugar.

What is the stabilizer for sugar syrup? ›

Sorbic acid or benzoic acid is stabilized in syrup and finished beverages by solubilizing potassium sorbate or sodium benzoate and then adding the solubilized potassium sorbate or sodium or potassium benzoate into a stabilizer solution at pH 2-4.

How do you preserve sugar syrup for a long time? ›

How to Store Simple Syrup
  1. Choose an airtight container. Store your homemade simple syrup in a sealed glass jar such as a Mason jar that you might otherwise use for jellies or preserves. ...
  2. Clean the container thoroughly. ...
  3. Place your syrup mixture into the refrigerator.
Dec 16, 2021

What are the 3 methods of syrup preparation? ›

1-Solution Method with Heat . 2- Agitation Method. 3-addition of a Medicated Liquid to Syrup.

Can fruits be preserved by storing them in sugar syrup? ›

Fruits may be canned in water, juice or a sweet syrup. The sweet syrup doesn't preserve the fruit but helps the fruit maintain its shape, color and flavor.

Why does simple syrup need to be boiled? ›

When you cook a simple syrup, the heat kills some of the bacteria and other microbes naturally occurring in the syrup. Add the syrup to a mason jar before it cools and the hot liquid will kill microbes in the jar as well.

Can you overcook sugar syrup? ›

If you were to cook it for longer, you would reduce the syrup, increasing the concentration of sugar in the solution. You'd have to reduce it an awful lot before you burnt this. However, if you reduce it too much, then the liquid will become solid when it is cooled.

Should you boil simple syrup? ›

Take care not to let the syrup actually boil, as this will evaporate the water and change the ratio of water to sugar.

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