How to Test Oil Temperature
Deep frying is normally done at between 360 and 375 degrees Fahrenheit and the following methods are designed to indicate when the oil reaches this temperature point
* Use the handle of a wooden spoon or a wooden chopstick. When the oil has preheated, dip the handle of a wooden spoon or a chopstick into the oil. If the oil starts steadily bubbling, then the oil is hot enough for frying. If the oil bubbles very very vigorously, then the oil is too hot and needs to cool off a touch. If no or very few bubbles pop up – then it’s not hot enough.
* The old Joy of Cooking method – drop a 1 inch square of bread into the oil. If it takes 60 seconds to brown, then the oil is at 365.
* The Cooks Illustrated Method – drop a single kernel of popcorn into the oil as you heat it. The kernel will pop as the oil reaches between 350 and 360 degrees. (Remove the kernel, eat it, and start frying)
Bron:
http://johndlee.hubpages.(...)ithout-a-Thermometer350F = 175C
375F = 190C