Right now for me, and this may sound weird, but it is the Build A Bear strawberry scent you can get put in your plushie.
Not because I frequently went to the Build A Bear Workshop as a kid. I only recently discovered their strawberry scent as an adult. But as a 2004 kid, the scent reminds me of when I was a kid and I would play with my 2003 era Strawberry Shortcake toys and it had that sweet strawberry scent.
Also, vanilla is always a classic nostalgic for me as well.
But what about you? What’s your favorite nostalgic scent?
I grew up in NYC and when I wanted to impress a girl I’d take them to this English soap/scent shop in Rockefeller Plaza called Crabtree & Evelyn at the end of a date and get them like a souvenir scent (soap, incense, whatever). I have no idea why I did this — I guess it just seemed fancy, and some of them really appreciated it. Anyway, long story short, now as an adult a bunch of stodgy British floral scents still make me horny.