Ella Walter
Deep frying is a cooking technique that can be done at home to create crispy, juicy, and perfectly seasoned dishes. It involves submerging food in hot oil, which requires precision to achieve the desired results. The process can be dangerous and intimidating for beginners, but with the right equipment and knowledge, anyone can master it. Electric deep fryers are a popular option for home cooks, as they make it easier to regulate temperature and contain splatters. This guide will cover the essential steps, safety precautions, and tips for successfully cooking with a deep fryer.
How to Cook with a Deep Fryer
| Characteristics | Values |
|---|---|
| Oil type | Peanut, safflower, canola, or vegetable oil |
| Oil level | Between 1/3 to 3/4 of the pot |
| Oil temperature | 355°F - 400°F |
| Oil reuse | Possible with filtering |
| Oil storage | In sealed containers in the fridge |
| Oil cooling | In the pot, then strain through a fine mesh strainer |
| Food | Chicken, fish, pork, dumplings, corndogs, curly fries, veggies, desserts |
| Food temperature | Room temperature |
| Food coating | Flour, egg, breadcrumbs, potato/corn starch, buttermilk |
| Food quantity | Small batches |
| Tools | Spider ladle, tongs, thermometer, basket |
| Safety | No lid on the pot |
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What You'll Learn
Oil temperature and smoke point
When deep frying, it's important to keep a close eye on the temperature of your oil. Deep frying is done at high temperatures, usually between 350 and 375 °F. If the oil gets too hot, it can start to smoke, which can ruin the flavour of your food. This temperature at which oil starts to smoke is called its smoke point. The smoke point of an oil is the temperature at which the oil starts to break down and turn into gaseous products.
Smoke points vary depending on the type of oil. For example, animal lard has a smoke point of 370°F (188°C), while peanut oil smokes between 440-450°F (227-230°C). Oils with a lower free-fatty acid content tend to have a higher smoke point, and most of these are plant-derived oils. It's important to choose an oil with a smoke point that is higher than the temperature you plan to cook at, so the oil doesn't break down too quickly. For example, avocado oil has a very high smoke point of 520-570°F (271-299°C), while olive oil has a lower smoke point and is not ideal for deep frying. Canola oil is a good choice for deep frying as it has a high smoke point and is relatively healthy.
If you don't have a thermometer to check the temperature of your oil, there are other ways to tell if it's hot enough. If you're using a tabletop electric fryer, you can simply set the temperature and wait for the pre-heat light to come on. If you're cooking on a stovetop, you can drop a kernel of popcorn into the oil – if it pops, the oil is ready. It's important not to overcrowd the pan when deep frying, as this can cause the oil temperature to drop, leading to soggy food.
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Oil level and displacement
For a commercial fryer, it is recommended to leave at least six inches of space between the oil and the top of the fryer's reservoir if there is no "max fill" line. This ensures that there is enough room for the food and baskets to displace the oil without causing it to overflow. For a countertop fryer, you should fill it no more than three-quarters of the way with oil.
When using an electric or gas fryer, filling the oil to the "max fill" line ensures that the fryer baskets can be fully submerged in the oil. A deep fryer typically requires 9 to 16 cups of oil to submerge a medium-sized batch of food, depending on the size of the fryer. However, due to varying fryer and food sizes, there is no one-size-fits-all answer for the amount of oil needed.
To account for displacement and bubble action, it is generally recommended not to fill the pot more than two-thirds full with oil. Additionally, overcrowding the pan can cause the oil temperature to drop, resulting in soggy food. Therefore, it is important to leave enough space in the fryer for the food to displace the oil without causing overflow.
The type of oil used for deep frying also affects the heating time. Different oils have different smoke points, which is the temperature at which the oil starts to break down and smoke. For example, peanut oil has a smoke point of 450°F, while vegetable oil has a smoke point of 400°F. It is important to choose an oil with a high smoke point for deep frying, such as vegetable oil, peanut oil, or rice bran oil.
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Oil filtering and reuse
Oil is a basic ingredient for any food dish, especially in Indian cuisine. It is used to enhance the flavour of gravies, for pan-frying, and for deep-frying crispy snacks. However, frying oil can be reused, and the number of times you can reuse it depends on the type of food you're frying. For example, battered or breaded foods like chicken will deteriorate the oil faster than cleanly fried products like potato chips.
If you're going to reuse frying oil, it's important to filter it properly to avoid compromising your health. Filtering the oil will remove any leftover batter or ingredient skin that may have been left behind during the frying process. These particles can cause trans-fat to form in oils, raise blood pressure, release large amounts of pollutants, and even cause the oil to become rancid.
There are several methods for filtering and reusing frying oil. One common method is to use a coffee filter or a cheesecloth. Place the filter or cloth in a mason jar and roll the edge over the lip of the jar. Then, pour the warm oil into the filter, being careful not to overfill it. It will take a few minutes for the oil to pass through, and caution should be taken as the oil is still hot enough to cause burns.
Another method is to use gelatin to filter the oil. Dissolve a teaspoon of gelatin in a half cup of boiling water, then stir it vigorously into the dirty oil. Transfer the mixture to an airtight container and place it in the fridge to allow the gelatin to solidify. Once it has solidified, the gelatin can be easily removed, taking all the trapped impurities with it.
Other methods of filtering frying oil include using a nylon cloth, a funnel with a cheesecloth, a fine mesh metal sieve lined with a paper towel, or a specialised oil purifier like the Oildok.
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Food coatings and batters
Battering and breading are essential steps in the deep-frying process, as they provide texture, flavour, and reduced moisture loss and oil uptake. The coating also helps to insulate the food, allowing it to cook more gently and evenly, rather than burning or drying out.
Breading usually consists of multiple layers. The first layer is typically a single layer of flour, which ensures that the surface of the food is dry and rough, so that the second, liquid layer adheres properly. This layer can be made up of beaten eggs or a dairy product. The final layer gives the food its texture and can consist of plain ground grains, ground nuts, or dry ground bread or bread-like products, such as breadcrumbs, crackers, or breakfast cereals.
A simple breading method involves soaking the food in buttermilk, then tossing it in seasoned flour, and finally, frying it at a high temperature in a high smoke point oil. This will result in a crispy and crunchy texture.
Batters, on the other hand, tend to be wetter and are often made with a combination of dry and wet ingredients. A basic batter recipe might include flour, cornflour, salt, and water. Other recipes call for additional ingredients such as milk, eggs, baking powder, and various seasonings. It is important to let the batter rest for a while before using it, to allow the gluten to relax. This will prevent the batter from shrinking and exposing the food underneath.
A classic batter recipe for fish and chips can be made with self-raising flour, salt, and water. For a lighter batter, the water can be replaced with beer. For a pleasant, gritty coating, the batter can be seasoned with Cajun seasoning, Old Bay Seasoning, or a pinch of chilli powder.
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Deep-fried food options
Deep-frying is an intimidating cooking technique that requires precise temperatures to achieve a crispy exterior with properly cooked interiors. The ideal temperature range for deep-frying is between 355°F and 400°F (180°C-200°C), with 375°F being the "Goldilocks" temperature. Oils with high smoke points, such as peanut, safflower, canola, or vegetable oil, are best for deep-frying as they can be heated to these temperatures without smoking.
Now, let's explore some mouth-watering deep-fried food options!
Meat and Seafood
- Fried chicken is a classic, whether it's battered or coated with a flour, egg, and bread crumb mixture.
- Karaage, a Japanese dish of bite-sized pieces of chicken, fish, octopus, or other meats, floured and deep-fried.
- Tonkatsu, a Japanese breaded and deep-fried pork cutlet (chicken versions are called chicken katsu).
- Si khrong mu thot, Thai deep-fried pork ribs.
- Beer-battered fish with a side of ranch dressing and hot sauce for dipping.
- Kushikatsu, a Japanese dish of skewered meat, vegetables, or seafood that is breaded and deep-fried.
- Nanbanzuke, marinated fried fish.
- Agedashi dofu, cubes of silken tofu coated with potato starch and deep-fried, served in a hot broth.
Vegetarian Options
- Gobi Manchurian, an Indian-Chinese dish of fried cauliflower popular in India.
- Tempura, a Japanese dish of deep-fried vegetables in a light, distinctive batter.
- Onion rings, a classic side dish or appetizer.
- Blooming onion, a large onion cut to resemble a flower, battered, and deep-fried.
- Peperoni cruschi, dried peppers from the Italian Basilicata region that are deep-fried in olive oil for a few seconds and used as a seasoning or vegetable chip.
- Korokke (croquette), a Japanese dish of breaded and deep-fried patties containing either mashed potato or white sauce mixed with minced meat, vegetables, or seafood.
- Fritto Misto, an Italian dish of mixed fried seafood and vegetables.
- Churros, a sweet and crispy Spanish treat, often served with chocolate sauce.
- Doughnuts, a classic deep-fried dessert, can be filled with cinnamon caramel or glazed with maple.
- Apple fritters, a delicious southern treat.
- Fried cookies.
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Frequently asked questions
Deep frying requires precise temperatures to achieve a crispy exterior and thoroughly cooked interior. The ideal temperature range is between 355°F and 400°F, depending on the food being fried. It's important to use a thermometer to monitor the oil temperature and adjust the heat source accordingly.
Peanut oil, safflower oil, canola oil, and vegetable oil are ideal for deep frying as they have high smoke points and neutral flavours. Oils with high smoke points can be heated to around 400°F without producing smoke.
Fill the pot with oil to a level between one-third and one-half full. This allows for food displacement and reduces the risk of overflow.
