3-4 days in winter and up to 1 day in summer.

Cakes are different from ordinary bread, which is mainly pasta-based, with very little other substances like cheese, mousse, or cream on top. Generally speaking, if the weather is moderate, it is not a problem to put three or four days. But the cake is different, cream, fruit, cheese, mousse, these are fresh things, put a long time will be bad.

Generally speaking, when you buy a cake, you eat it right away, and you can't put it away for too long. Even if you put it in the refrigerator yourself, it's not recommended for more than a day. We can put it in the refrigerator to improve the taste, but we can't put it in the refrigerator to keep it.

Buttercream refrigerated preservation methods:

1, put a single layer of cake in the baking dish and cover tightly. Put the double or triple layer cake in a cake box, or use a bowl to fasten it.

2. Cakes with whipped cream frosting or cream filling must be stored in the refrigerator. If wrapped in plastic, unfrosted cakes can be frozen for up to four months. To thaw, do not remove the wrapping and thaw at room temperature.

3. Cakes with frosting should be frozen unwrapped until the frosting hardens, then wrapped tightly and sealed, and can be frozen for up to two months. When thawing, remove the packaging first, then thaw at room temperature or in the refrigerator.

The above references? Baidu Encyclopedia-Cake (dessert made with eggs, sugar, and wheat flour as the main ingredient)