It should last for 2-3 days.
We would agree with that! A youngster could produce, in about 10 minutes, enough butter to last for several days, and some buttermilk to drink.
The cake has so much flavor, it doesn't even require any frosting.
I have divided this guide into eight steps: Note: This post may contain affiliate links.
I do think the secret is to use a hand mixer and mix the butter, suger, vanilla combination for a good five minutes on high.
Because it turned out beautifully.