Oven preheating, baking height.

1. Oven preheating: Before baking any food, the oven needs to be preheated to the specified temperature to meet the baking time on the recipe. It takes 10 minutes to preheat the oven. If it is not enough, the specified temperature will not be reached. If the oven is preheated and left empty for too long, it will also affect the service life of the oven.

2. Baking height: When baking things in a small oven, just put the food in it. Medium-sized ovens have three levels of upper, middle and lower heights to choose from. As long as the recipe does not specifically indicate the upper and lower heat temperatures, just place the baking sheet on the middle level.