Steamy Standing Time: How Food Size Impacts Carryover Cooking

Difficulty
Time Required	Average (6-10 days)
Prerequisites	None
Material Availability	Readily available
Cost	Low ($20 - $50)
Safety	Adult supervision is required when using the oven.

*Note: This is an abbreviated Project Idea, without notes to start your background research, a specific list of materials, or a procedure for how to do the experiment. You can identify abbreviated Project Ideas by the asterisk at the end of the title. If you want a Project Idea with full instructions, please pick one without an asterisk.

Abstract

"What? My food needs some standing time? How can food stand? I don't see any legs on those baked potatoes!" Whether you're using a traditional oven or a microwave, standing time is an important concept in cooking or baking. When you remove a food from an oven or a microwave, the food retains heat and continues to cook for several minutes after it has been removed from the heat source. This process of the food continuing to cook, using the retained heat in the food itself, is called carryover cooking. It is the reason why many recipes call for standing time. The carryover cooking that occurs during standing time causes the internal temperature of the food to rise several degrees and allows for the temperature to become more equalized throughout the food. How much carryover cooking is possible depends upon the size of the food, its density, its heat capacity (ability to retain heat), and how hot its internal temperature is when you remove it from the oven. Foods that are high in water have a high heat capacity, and therefore, are excellent at carryover cooking. Thus, failure to allow for standing time results in food that is overdone.

In this cooking and food science project, you will explore how much the size of the food relates to its final internal temperature. You will roast different sizes of the same type of meat to the same internal temperature, remove them from the oven, and measure and record their internal temperature every few seconds over several minutes, using an electric probe or instant-read oven thermometer placed in the center of the roast, avoiding any bone. How much does the volume of the roast impact the amount of carryover cooking that can be achieved? What about the surface-area-to-volume ratio (or "compactness" of the roast)? Does that impact how much carryover cooking is possible, as well? As another variation, you could see how different types of foods with different densities, but the same volume are affected by carryover cooking.

Cooking and Food Science fair project example of a roast experiencing carryover cooking outside the oven

Figure 1. This cartoon shows a roast experiencing carryover cooking outside the oven with an instant read thermometer in its center. (USDA, 2006.)

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MLA Style

Science Buddies Staff. "Steamy Standing Time: How Food Size Impacts Carryover Cooking." Science Buddies, 28 July 2017, https://www.sciencebuddies.org/science-fair-projects/project-ideas/FoodSci_p067/cooking-food-science/carryover-cooking. Accessed 24 June 2018.

APA Style

Science Buddies Staff. (2017, July 28). Steamy Standing Time: How Food Size Impacts Carryover Cooking. Retrieved from https://www.sciencebuddies.org/science-fair-projects/project-ideas/FoodSci_p067/cooking-food-science/carryover-cooking

Last edit date: 2017-07-28

Bibliography

This source offers a discussion of standing time in microwave ovens:

USDA. (2006, July 26). Microwave Ovens and Food Safety. Retrieved January 18, 2010, from https://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/appliances-and-thermometers/microwave-ovens-and-food-safety/ct_index

This source shows how to place a thermometer in meat, avoiding the bone:

USDA. (2006, December 15). Proper Thermometer Placement. Retrieved January 18, 2010, from https://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/teach-others/fsis-educational-campaigns/thermy/proper-thermometer-placement/ct_index

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Steamy Standing Time: How Food Size Impacts Carryover Cooking *

Abstract