I’ve been trying to search this up but there are so many mixed reviews/stuff that irrevalent
If you believe in the validity of rankings:
https://www.usnews.com/education/best-global-universities/biology-biochemistry
So, based simply on rankings, the answer to your question is Harvard and Yale. If your use of the term “Ivies” means highly-selective universities, not just those in the Ivy League, then (within the US) you also have MIT, Stanford, Caltech, Berkeley (and a couple of other UCs) – the usual suspects for STEM, in general.
Moderator’s note: Edited to fix link
What to you mean when you say biochem? That is a pretty diverse field, so you might consider a specific focus.
Of the ivies proper, Cornell has the broadest selection of bio-related options. Check HumEc and CALS in addition to CAS.
All the Ivies have excellent programs in the life and physical sciences (generally this is the case for any well-ranked school). If you are talking engineering, it is a different story, however.
Not all of the Ivys have the exact “Biochem” major although it is quite easy to “build your own” biochem major. For example, Harvard no longer offers Biochemistry as a concentration, but you can do a joint in one of the life sciences and chemistry. Princeton doesn’t have biochemistry either, but you could major in bio or chem and then do some certificates in bio/chem related areas.
All of them have good research opportunities in the field. All of them have strong bio and chem programs. The academic part is good at all of them; the main issue for you should be other “fit” factors (size, location, weather, core vs open curriculum etc).