What's a good glue to use to adhere a small mirror to a piece of wood (craft project)?

i want to glue a small mirror (like 3” diameter) to a piece of wood. what is a good adhesive that will not ruin the back of the mirror? i see there’s something called Mirror Mastic but that seems like a caulky, bulky substance that i don’t think would work for a small project like a craft.

i do decoupage and want to make a small wooden plaque with a small mirror glued to it.