For obvious reasons, Bucky couldn't go with Steve, Pepper and Nat when they went out to deliver the fudge to the LGBTQ center for the fundraiser. Instead, he spent the morning cleaning up after the fudge-pocalypse and thinking.
By the time he finished, the smell of fudge was mostly gone, the kitchen was shining, and he had an idea.
He spent the afternoon on one of Tony's computers, after being assured that it was hack-proof and no one, except Tony himself, would be able to backtrack anything Bucky did.
Hydra would be hurting by the time he finished with them.