Slow layering involves gradually building flavors and textures over time through low-temperature cooking, while flash cooking uses high heat for a short duration to quickly cook food, often to achieve a specific texture or sear.
Slow layering is a cooking technique focused on developing complex flavors and textures by cooking ingredients sequentially at lower temperatures. This allows each ingredient to release its flavors and aromas, which then meld together over time. Think of a slow-cooked stew where vegetables are sautéed before adding meat, which is then browned before adding stock. Each step builds upon the previous one, creating a richer, more nuanced final product. The low temperature ensures that ingredients don't overcook or burn, allowing for a more controlled and even cooking process.
Flash cooking, on the other hand, is all about speed and high heat. It's used to quickly cook food, often to achieve a specific texture, such as a seared exterior with a rare interior. Stir-frying is a prime example of flash cooking. Ingredients are added to a very hot wok and cooked quickly, preserving their crispness and freshness. The high heat also creates a Maillard reaction, which contributes to browning and flavor development. Flash cooking requires careful attention and precise timing to prevent overcooking.
When flash cooking, ensure your pan is preheated to the correct temperature before adding any ingredients. A cold pan will lower the temperature and prevent proper searing, leading to steamed or soggy food.