vegetable oil or peanut oil - two inches worth in a stir fry pan

Vegetable oil is a neutral fat derived from the seeds or fruits of various plants, including soybean, canola, sunflower, safflower, and cottonseed. These oils are extracted through mechanical pressing or solvent extraction and are typically refined, bleached, and deodorized to create a clear, odorless product suitable for cooking. Vegetable oil has a high smoke point (typically 400-450°F / 200-230°C), making it ideal for high-heat cooking applications. It contains a blend of polyunsaturated and monounsaturated fats, with minimal flavor contribution to dishes.

Peanut oil, extracted from peanut legumes, offers a slightly elevated smoke point (450°F / 232°C) and a subtle, delicate nutty flavor when unrefined. Refined peanut oil is nearly flavorless and nearly as neutral as generic vegetable oil. Both are versatile, widely available, and economical for commercial and home cooking.

Both vegetable oil and peanut oil are essential in stir-frying due to their high smoke points and neutral flavor profiles, allowing ingredients to dominate the dish. Vegetable oil is the workhorse of global kitchens, used for sautéing, deep-frying, baking, and dressing salads. Peanut oil is particularly favored in Asian cuisines, especially Chinese and Southeast Asian cooking, where its mild nutty undertone complements wok cooking and fried preparations without competing with aromatic ingredients like garlic, ginger, and soy sauce.

In stir-frying specifically, these oils coat the pan evenly and heat rapidly to achieve the characteristic high-heat sear and wok hei (breath of the wok) effect. Both oils are used at similar volumes and heating temperatures, making them interchangeable in most recipes. Peanut oil may be preferred when subtle flavor is desired, while vegetable oil is chosen for cost-effectiveness and universal compatibility.