Router bit for flattening slabs?

[smurg]

I bought this one for that exact same useage. It worked well especially since it has rounded corners, should you tip the router slightly, no gouges. Its from MLCS

I bought the same type from Freud and it worked well (99-026).

 

[eyekode]

I'll tell you the wrong way to do it: I used a simple 3/4" plunge bit. Took quite some time to finish!

https://ncwoodworker.net/forums/index.php?threads/need-suggestions-for-finish-on-funky-end-grain-table.69173/#post-643571

 

[gamiller3rd]

Seems like Infinity Tools has a mega-dado bit that works for this.