What’s an appropriate “thank you” for admin who go above and beyond?

I’m a TT professor at an R1 (STEM, US, vhcol city). Someone on my finance team has really been amazing on this last grant, and I’d love to send them a little something to say thank you.

Would a $20 gift card sent via email with a short note be appropriate?

I don’t want it to be awkward — they were basically just doing their job — but they also did their job really well, and I feel like admins are often overlooked and underappreciated, especially in current era (IDC cuts and more).