Serious Eats: Talk

Molten Chocolate Cake--preparation advice

I'm planning on making Jean-Georges famous warm chocolate cake for dessert on Valentine's Day. The recipe is here here. My issue is that I would like to make the batter beforehand and then bake the ramekins after dinner. Any thoughts about this? Will the mixture harden? Has anybody tried making this or a similar recipe in 2 parts?
Any wisdom would be greatly appreciated!

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