From: Year of Wonder, by Geraldine Brooks
speaking of a dress fashioned by the new taylor in town, she says:

It was a golden green color, the color of sunlight-dappled leaves, of modest stgle, but well cut and flattering, its whisks and handstrimmed in a Genoa lace.


whisketis also used.. but it is something different, since it seems to be portable, and a basket or some sort of bag, you encounter lines about 'removed the oat cakes from my whisket..,and 'set down my whisket'

From the OED, the only unexpected use of whisk is for 'a lady's neckerchief' or gorgette, often embroidered. Whisket, with or without the h, is as you surmise, a local term for a basket which may be of various types for various uses.

removed the oat cakes from my whisket

...which could be a challenge if you have a bit of a sticky one.

Ah! But Scottish oat cakes aren't sticky:

Scottish Oat Cakes

2 C plus 2 T oatmeal
1/2 t baking soda
salt
1 oz butter, melted
Approximately 6 T water


Preheat the oven to 350.

Combine 2 cups of the oatmeal with the baking soda and a pinch of salt. Add the melted butter and the water, a tablespoon at a time, until you have a stiff but pliable dough.

Spread the remaining 2 T oatmeal on a pastry board and roll out the dough to approximately 1/8 inch thickness. Using a wine glass, cut the dough into 3-inch rounds.

Bake the rounds on a greased baking sheet for 15 minutes or until they begin to turn a golden brown color. Turn off the heat and leave them in the oven with the door open for 5 more minutes. Allow to cool and store in an airtight container.

Makes approximately 12.

oat cakes aren't sticky

Ah, sticky whisket?