Connecting two HDMI monitors to Late 2012 Mac mini I have two Samsung monitors with HDMI input.

Is it possible to connect them simultaneously to my Mac mini using HDMI? I wish to have a extended desktop setup.
Yes! Get a mDP (Mini DisplayPort) to HDMI cable. Then plug that into the Thunderbolt port, and run the other monitor from the HDMI port.

Here’s an arbitrary example of a mDP-HDMI cable.