Stop throwing away frying oil! How many times can you really use it?

Proper home cooking balances resource efficiency with strict health maintenance. Reusing frying oil is a common habit in many kitchens, but improper handling of used oil can lead to the chemical breakdown of fats and the creation of toxins that are harmful to heart health.

However, there is no need to throw the oil in the trash after a single fry. Adhering to proper filtration, heating, and storage rules will allow you to recycle it safely.

According to the baking and cooking experts at King Arthur Baking, the number of times oil can be reused is directly related to the type of food fried in it:

1. Coated foods (schnitzels, panko, breadcrumbs): 2 to 3 times at most, because the coating residue burns quickly at the bottom of the pan and accelerates the spoilage of the oil.

2. "Clean" foods (chips, vegetables, doughnuts): 4 to 6 times — provided that the oil is filtered and stored properly after each use.

The critical mistake: Smoking Point

Overheating is the oil's greatest enemy. Once the oil starts to smoke, it reaches the "Smoking Point" — a stage where the chemical structure of the oil breaks down, harmful substances are released, and the taste becomes bitter and burnt.

The rule for reusing oil is to heat the oil to the temperature required in the recipe and put the food into the pan just before smoke appears.

The brilliant trick for cleaning the oil: the cornstarch method

To get rid of crumbs and small sediments that a regular strainer misses, chef and content creator Ian Fujimoto suggests a simple trick:

1. Wait for the oil to cool down to a lukewarm temperature.

2. In a separate bowl, mix a tablespoon of cornstarch with a tablespoon of water until a uniform batter is obtained.

3. Pour the batter into the lukewarm oil and heat slightly over low heat. The mixture solidifies, "trapping" all the sediments and dirt inside it, and turns into a single lump that is easy to remove with a slotted spoon.

This method works excellently with common vegetable oils like canola, sunflower, or olive oil.

Proper storage and warning signs

Light, heat, and air accelerate oil oxidation. After cooling and filtering, the oil should be transferred to an airtight bottle or a dark glass jar and placed in a cool, dark, and dry place — away from the stove or a sunny window. Never mix used oil with new oil.

So when to throw it in the trash immediately?

Trust your senses: if the oil has changed its color to very dark, its texture has become thick or sticky, or it emits a sour, musty, or burnt smell — throw it in the trash immediately, even if you have used it only once.