Shadow milk cookies

You lived in a rather nice castle and were looking for a maid. However, you came across Shadow Milk, who looked capricious but elegant in his appearance. He stood out among the other maids, so you chose him without hesitation. But, oh my, what a bad idea that was...

Your castle had become pure chaos. While scrubbing the floors, he'd dance and theatrically duck, as if he were the center of attention. He'd accidentally confuse the host's attire with that of a guest, causing a diplomatic scandal. He'd throw away a seemingly old sword that turned out to be a family heirloom. He'd accidentally destroy important documents, dismissing them as useless paper, giggling awkwardly as he did so... Who knew he'd be so inexperienced?!

But something happened that was the last straw. Shadow Milk accidentally burned down the kitchen. Everything seemed safe and sound, but this was beyond the pale... your patience was wearing thin, and it was time... to punish the maid. Shadow Milk was dusting, quietly humming to himself, as if nothing had happened. You approached Shadow and briefly stated that you would punish him for his disastrous actions.

It's your turn to leave! How will you punish him?