Knitting is many things. Instantaneous is not one of them.
This is about as close as it gets though,
knit in stashed Brown Sheep Lamb's Pride Worsted in cream
My niece asked for boot cuffs, and I churned these out in one evening.*
I used scrap yarn, weighing it periodically so I'd get the cuffs to match. These are shorter than the pattern calls for, but they work just fine.
I feel grateful she wants boot cuffs and not kilt hose. I think she's going to want more of these.
*It's hilarious that I think one evening is practically instantaneous. How knitting has altered my perception of normal.