Your grandpa is giving you sound advice! It's generally not recommended to put steaming hot pudding directly into the fridge. Here's why:
Temperature shock: Placing hot food in a cold environment like the refrigerator can cause a sudden and significant drop in temperature. This temperature shock can be detrimental to the texture and consistency of the pudding. It may cause the pudding to develop a layer of condensation on top or even alter the texture, making it grainy or watery.
Food safety: When hot food is put directly into the fridge, it can raise the temperature inside the refrigerator, potentially leading to the spoilage of other perishable foods. It's essential to maintain a consistent and safe temperature in the fridge to prevent the growth of harmful bacteria.
To properly cool steaming pudding before refrigeration, follow these steps:
Let it stand: Once the pudding is cooked, remove it from the stove and allow it to stand at room temperature for about 15-20 minutes. This helps it cool down slightly before transferring it to the fridge.
Use shallow containers: Instead of putting the entire pot of pudding into the fridge, transfer it into shallow containers. The larger the volume of hot food, the longer it will take to cool down, and this can be a safety concern.
Cover and refrigerate: After the pudding has cooled down for a bit, cover the containers with lids or plastic wrap and place them in the refrigerator for further cooling.
By following these steps, you'll help ensure that your pudding cools down gradually and safely, preserving its texture and avoiding any potential food safety issues.