Oh, your friend baked a cake, did she? We wish we had a nickel (well, a quarter) for every question we get from someone whose friend has a cooking problem.

Well, ask your friend what in blazes she was doing baking a cake at 482°F (250°C) – a temperature near the top of most household ovens. Most cakes are baked in the 300°F to 350°F range (150°C to 175°C). It is a rare cake indeed that bakes at 375°F (190°C) or above. At a reasonable temperature, the cake cooks all the way through without the outsides being incinerated.

If she was using a recipe that specified such a hot oven, she should get rid of it. If she was guessing at a good temperature, she should set her sights a lot lower.

What should your friend do now with a cake that is burnt on top and batter in the middle? We would throw it out and start over. There is probably not enough to try to salvage.

And in general, one does not take a cake from the oven and put it right in the refrigerator. Cakes are generally gently cooled on a rack at room temperature. Indeed, most cakes are not refrigerated at all.