Briefly about Holy Chef, Crazy Empress manga:
The top killer of the 21st century crossed time and space into the Cold Palace as a useless Empress. To have a good life in the harem, you need to be good in the Royal Kitchen and excellent in the Emperor’s bed. There is a super handsome and evil-minded husband and a cute baby genius – not to forget the superb Royal Kitchen system for lotteries. Conquer this dapper man with a pot and a spoon, dominate the harem and embark on the pinnacle of life!