How long do you cool a double cake before flipping?

It is generally recommended to let a double cake cool for at least 30 minutes before attempting to flip it. This allows the cake to set and firm up slightly, making it less likely to break or fall apart when you flip it.

Here's a more detailed guideline for cooling a double cake:

1. Let the cake cool in the pan for 10 minutes. This allows the cake to start setting and will prevent it from sticking to the pan.

2. Turn the cake out onto a wire rack to cool completely. This allows air to circulate around the cake and helps it to cool evenly.

3. Wait at least 30 minutes before flipping the cake. This gives the cake time to set and firm up. If you flip the cake too soon, it may break or fall apart.