Sugar stages

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(Redirected from Temperatures of toffee)

The final texture of candy depends on the sugar concentration. As the syrup is heated, it boils, water evaporates, the sugar concentration increases, and the boiling point rises. A given temperature corresponds to a particular sugar concentration. In general, higher temperatures and greater sugar concentrations result in hard, brittle candies, and lower temperatures result in softer candies. These "stages" of sugar cooking are:

StageTemperature in °FTemperature in °CSugar concentration
thread230-233°F110-111°C80%Syrup will form a loose thin thread. Used for sugar syrups.
soft ball (e.g., fudge)234-240°F112-115°C85%Syrup will form a soft, sticky ball that can be flattened when removed from the water. Used for caramels, fudge, pralines, fondant, and butter creams
firm ball244-248°F118-120°C87%Syrup will form a firm but pliable, sticky ball that holds it shape briefly. Used for caramels, butter creams, nougat, marshmallows, Italian meringues, gummies, and toffees
hard ball250-266°F121-130°C92%Syrup will form a hard, sticky ball that holds its shape. Used for caramels, nougat, divinity and toffees
soft crack270-290°F132-143°C95%Syrup will form strands that are firm yet pliable. Used for butterscotch, firm nougat, and taffy
hard crack (e.g., toffee)295-310°F146-154°C99%Syrup will form threads that are stiff (brittle) and break easily. Used for brittles, toffees, glazed fruit, hard sweets, pulled poured and spun sugar
clear liquid320°F160°C100%
brown liquid (caramel)338°F170°C100%Syrup will become transparent and will change colour, ranging from light golden brown to dark amber. Used for pralines, brittles, caramel-coated moulds, and nougatine
burnt sugar350°F177°C100%
Sugar stages shown on a thermometer
Sugar stages on a thermometer

The names come from the process used to test the syrup before thermometers became affordable: a small spoonful of syrup was dropped into cold water, and the characteristics of the resulting lump were evaluated to determine the concentration of the syrup. Long strings of hardened sugar indicate "Thread" stage, while a smooth lump indicates "ball" stages, with the corresponding hardness described. The "crack" stages are indicated by a ball of candy so brittle that the rapid cooling from the water literally causes it to crack.

This method is still used today in some kitchens. A candy thermometer is more convenient, but has the drawback of not automatically adjusting for local conditions such as altitude, as the cold water test does.

Once the syrup reaches 340°F or higher, the sucrose molecules break down into many simpler sugars, creating an amber-coloured substance known as caramel. This should not be confused with caramel candy, although it is the candy's main flavouring.

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