Secrets to Successful Fudge

By Christina Blais Published May 27th, 2012 5 stars (15)
Secrets to Successful Fudge


“Real” fudge is nothing more than white sugar, brown sugar and, you guessed it, cream. A bit of vanilla or maple extract for flavour, nuts if you desire, and you have that sweetest of sweet treats found in so many Canadian homes. Other ingredients can be added depending on the recipe you’re working with: icing sugar, maple syrup, corn syrup, evaporated milk, marshmallows… Ricardo even adds white chocolate.

But the real secret to successful fudge is not so much in the ingredients as in how you make it.

Desired texture

What do you look for in a piece of fudge? It should hold together well without being too hard and, above all, has to melt in your mouth when you take a bite. It’s the size of sugar crystals that makes the knees of fudge lovers buckle… the smaller the crystals, the less they are perceived on the tongue and the more the fudge tastes smooth and creamy. Cooking, and beating after cooking, is the key to successful fudge.


Cooking is necessary to dissolve sugar crystals and to evaporate part of the water in the cream. The length of this step has a direct impact on the firmness of the fudge. As water gradually evaporates, sugar is concentrated and the temperature of the mixture rises above 100 °C (212 °F). If there is too much evaporation, when the cooking time is too long, there will not be enough water left in the fudge and it will be too hard. Conversely, if the cooking time is too brief and there is not enough evaporation, too much water will remain and the fudge will be too soft. A temperature of between 112 and 114 °C (234 and 237 °F) must be maintained. This will ensure the fudge has the ideal concentration of water and sugar.

Must-have: candy thermometer

Fudge is difficult to make. Don’t rely on recipes that tell you to boil the fudge mixture for a specific amount of time. There are too many unknowns to set an exact time. Cooking time depends on the size of your pan – the bigger it is, the more evaporation will occur – plus the heat intensity or power level of the microwave. The best way to check if it’s done is to measure with a candy thermometer or do a cold water test.

Secret # 1: don’t stir during cooking

Fudge can be cooked on the stove or in the microwave.  The advantage of using a microwave is that the mixture will not stick to the bottom of the pan during cooking. In both cases, sugar and cream must be brought to a boil by gently stirring then – and this is very important – refrain from stirring again throughout the rest of the cooking process. Sugar crystallization causes a chain reaction: if a crystal is present in the mixture, other sugar molecules will attach to it and the mixture may seize and become grainy.

Avoid crystallization

During cooking, sugar crystals can stick to the sides of the pan. If you stir the mixture, these crystals could fall in and crystallize a part of the sugar again. To work around this issue and dissolve all crystal traces, brush the sides of the pan with a brush dipped in water at the beginning of the cooking process.

Secret # 2: let cool before beating

After being cooked, the sugar must crystallize again to create fudge. This stage will determine the size of the sugar crystals. The sugar should ideally form small crystals that are barely discernable on the tongue. To achieve this, let the mixture cool for fifteen minutes before beating it. It will thicken as it cools so when you beat the mixture, sugar molecules will have a tough time clinging to one another (it’s like trying to swim in molasses!). The result: crystals that form stay small. Experience has shown that you should beat the mixture when its temperature ranges from 43 to 45 °C (110 to 113 °F), which normally occurs fifteen minutes after the pan is removed from heat. The fudge is warm, but not burning hot.

Secret # 3: beat the mixture

After letting the fudge cool, it’s time to beat it. It is important to stir constantly with a wooden spoon until the mixture starts to thicken and its surface starts to look dull or matte. Now is the time to stop beating and pour the fudge into a mould. Another tip: do not scrape the sides of the pan or the spoon used for stirring. They are often covered with a grainier layer of fudge.

To sum up… six tips to successful fudge

  • Use a heavy pan that distributes heat well or the mixture may stick during cooking. This advice does not apply if you are making fudge in the microwave.
  • Brush the sides of the pan with a wet brush at the beginning of cooking to dissolve sugar crystals stuck to the sides.
  • Never stir the mixture during cooking or sugar could crystallize again. The mixture may seize and become grainy.
  • Use a candy thermometer or conduct a cold water test to check if the fudge is done. Do not rely on the cooking time indicated in your recipe. The fudge is ready when a candy thermometer reads between 112 to 114 °C (234 to 237 °F) or the mixture forms a soft ball in cold water.
  • Let the mixture cool before beating. The temperature at this point should be between 43 to 45 °C (110 to 113 °F). The fudge should be warm but not burning hot.
  • Stop beating when the surface of the mixture starts to look dull or matte. Pour immediately into a mould that has been buttered or lined with parchment paper and let cool completely.
Christina Blais

Christina Blais

For Christina Blais, explaining food chemistry to the masses is as simple as making a good omelet. Holding a Bachelor and Master degree in Nutrition, she has been a part-time lecturer for nearly 20 years in the Department of Nutrition at the Université de Montréal, where she teaches food science courses. She has been sharing the fruits of her experience with Ricardo since 2001, during his daily show broadcast on ICI Radio-Canada Télé. And diehards can also read her column, Chimie alimentaire (Food Chemistry), in each issue of Ricardo magazine.


  1. John D: Since you have a 25-year history of making fudge, I would certainly appreciate getting your input from you as to a fudge recipe which is as follows: 3 TBSP Hershey's cocoa; 3/4 cup milk; 2 1/2 cup granulated sugar; 4 TBSP. butter (soften to room temperature); splash of vanilla & a pinch of salt. It turned out "wonderful" on my kitchen stove. I increased the ingredients to make 20 lbs. on a Savage Bros. stove, copper kettle and marble slab table-would not set to cut. I would appreciate your help

  2. I would ask John D. if he agrees with the other candy-making processes and temps listed in this article? My father used to make chocolate fudge with Hershey's chocolate and used the cold water test for the correct ball consistency. I could never figure out the exact state of the ball consistency to use this method, so I'm still at a loss. Guess I am going to have to waste a few runs of fudge to learn what will get me the correct process for a successful plate of fudge.

  3. This is a very helpful article to a new fudge maker. However, John D. is 100% correct! i made some fudge the other day and let cool to 110 and it started settng up in the pot while i was stirring and then ended up super crumbly.Dont let it cool that long!

  4. The recommended cooling temperatures are off by 40 degrees. You have to begin the stirring process way-way sooner for this to work I have been making fudge for over 25 years I just hate to see people get information that will cause discouragement frustration and wasted food. I do not understand why this bad info keeps getting passed on If she had actually used these tips as claimed she is either a mean prankster or uses a broken thermometer or simply copied and pasted and claims it is good info.

  5. I have been making fudge for over 25 years. I have no idea why I continue to see tips that would cause a certain catastrophe and waste of food. If you wait for fudge to cool to the suggested temperature in this article you will end up with fudge setting up in the pot before you can stir it for 2 minutes. I do not know why this incorrect information is perpetuated but Trust me you need to start stirring WAY sooner like 150 to 165 F. Unless you prefer ruined fudge in the pot.

  6. Excellent

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