It sounds like the tutorial is saying (a video link with a time stamp)

so this is what they should look like when they're all done. deal them cool completely

I am aware that the presenter waited until the bread cooled down to cut it.

The question is,

what the presenter is saying to express the meaning?

it sounds like "deal" in "deal it them cool", although that is not a commonly used way.

considering that word as "till" makes more sense, although the word following is "them"

So, what that word could be?