A method for forming a fat and oil composition for deep frying includes combining a crude oil or intermediate oil product with an edible oil and an ascorbic acid and/or an ascorbic acid derivative to form the fat and oil composition. The crude oil or intermediate oil product includes a phosphorus component such that the phosphorus component is provided in an amount of 0.1 ppm to 10 ppm of the oil and fat composition. The ascorbic acid and/or an ascorbic acid derivative in an ascorbic acid equivalent is provided in an amount of 2 ppm to 130 ppm of the oil and fat composition. The edible oil in the oil and fat composition includes a component such as soy bean oil, rapeseed oil, palm olein, or any one or more combinations thereof.
