some kind of magical dust

Dried leaves, pumpkin seeds, and an assortment of jewelry.

A used tealight candle. There's only a bit of wax left. Barely one chalk stick, it's smaller than a pinky toe. A pack of matchsticks, but there's only two left. And a nondescript medicine bottle filled with colorful capsules.

Gold coins

is herself the thing in the extradimensional pocket of an enchanted emerald. The emerald is amongst the heap of clothing and shoes and other spell casting accoutrements on the floor, and is still fixed on the end of her wand. Must have been a backfire. Hopefully her preying mantis familiar can get her out without getting eaten by the castle mice who undoubtedly know she's unprotected by her mistress just now and might go in for a little rodenty nibble.

What pockets? But well, you probably keep a handmade weapon somewhere, like a sharp stone dagger?

Mischief and snake eyes.

Crumpled sticky notes with story ideas, receipts from their favorite cafe, a pencil, a black ink pen, and half of an eraser.

Seeds to plant when you find a spot where the snow starts to thin.

Booty ;)

Hehehehehe. xD

Snacks! With lots of chocolate.

: A spare set of shoelaces, kohl for your eyes, chewing gum, and some ill-gotten treasure, most likely.

clear nail polish for repairs of those hose and that filmy skirt and bouse, a cloud generator, and a rather low-limit credit card.

Moana had a stash on her raft, y'know.

: A travel-sized bottle of Nair, an emergency extra plume for your dapper hat, and a whimsical souvenir shot glass that you'll end up burying in a kitchen cabinet behind a bunch of dishes and forgetting all about until the next time you move house and when you're packing things up, you'll find it and exclaim, "Hey, where did this thing come from?!" before you pack it behind the dishes in your new house and forget all about it again. Repeat ad infinitum. Poor shot glass.

Emergency candy, cell phone, and two tickets to the next pop concert.

A bundle of charred finger bones and a tooth from some large unfortunate creature. Scratched into the tooth is a winding scripture of unknown origin.

a small notebook from their great aunt that has the incantation necessary to activate that pendant whose holy radiation will destroy the critter that's been awakened and is devouring everyone in these woods. Too bad the critter knows this and doesn't. I mean who reads nowadays and she was rumored to be kinda dotty.

Hope they don't get eaten in the opening sequence before the titles.

Filled with beer bottle caps. You don't like to throw them away.

Fallen fingers :I

a small tublet of industrial strength face schmutz remover, an orange cabochon that when swriled around three times generates a shaft of heavenly light aimed at her, and candy coated licorice pastilles.