Doubling on split aces

The last time I was in Vegas, something I get to do once a year but skipped last year thanks to the pandemic, I was dealt two aces. I split them. Each got another ace (Two deck game). I could not resplit aces and I was so stunned that I didn't ask the dealer the question I asked myself on the plane home: could I have doubled down on each of the two split hands? I realize that the dealer's up card figures into the decision, but since when you double you don't need to bet an amount equal to your original bet, I could have just put another nickel next to the green chip. Then at least I might have had a fighting chance.
Both 12s or 2s lost.
So, how many clubs let you double down on split aces when they let you double down on split hands?
And if you could, would you?

Quote: gratianus

The last time I was in Vegas, something I get to do once a year but skipped last year thanks to the pandemic, I was dealt two aces. I split them. Each got another ace (Two deck game). I could not resplit aces and I was so stunned that I didn't ask the dealer the question I asked myself on the plane home: could I have doubled down on each of the two split hands? I realize that the dealer's up card figures into the decision, but since when you double you don't need to bet an amount equal to your original bet, I could have just put another nickel next to the green chip. Then at least I might have had a fighting chance.
Both 12s or 2s lost.
So, how many clubs let you double down on split aces when they let you double down on split hands?
And if you could, would you?

I have never heard of a casino's allowing doubling down on a split aces hand. But doubling down soft 12 would always be higher EV than standing on 12, at least for infinite-deck blackjack.

The table below shows the difference between the doubling and standing EVs for a unit bet for infinite decks.



And by the way, doubling soft 12-16 is better than standing. And doubling soft 17 vs 2-9 is better than standing.

Quote: gratianus

The last time I was in Vegas, something I get to do once a year but skipped last year thanks to the pandemic, I was dealt two aces. I split them. Each got another ace (Two deck game). I could not resplit aces and I was so stunned that I didn't ask the dealer the question I asked myself on the plane home: could I have doubled down on each of the two split hands? I realize that the dealer's up card figures into the decision, but since when you double you don't need to bet an amount equal to your original bet, I could have just put another nickel next to the green chip. Then at least I might have had a fighting chance.
Both 12s or 2s lost.
So, how many clubs let you double down on split aces when they let you double down on split hands?
And if you could, would you?

As of about a year ago, no casino in Las Vegas would let you Double on Split Aces. The common rule is "Split Aces received only one card".
There's about 3 casinos in USA who would let you Double On Split Aces.
With A-A, it's always better to Double than Stand against any dealer up card and for both S17 and H17 games. Number of decks? At least up to 8 decks, cause I have not checked it with more decks.