Spike knew at the time the words would curse him, even if he had technically stopped himself before he could utter the full phrase. He had merely failed to imagine the magnitude.
It would not go in the record books, because it was technically confined to a single floor of a single building: the ground floor of the library. Further, none of those involved would consider submitting it for public, official records, each for their own reasons: Twilight did not want to gain a reputation for a messy home; Spike was embarrassed that it had happened under his watch; Sanguine had made worse messes though not specifically in the category of food; and the food had not been enchanted with any means of communication - and would all be eaten within the day, anyway.
In the interest of a full accounting, strong assisting credit must be given to Twilight's experiments in animate, self-cooking food. Sanguine herself, however energetic and untalented at cooking she was, was only one pony, and Spike was a more than capable assistant. It was not until the ingredients - having awoken incorrectly as a consequence of Sanguine's curiosity, a magical talent as low as most non-unicorn ponies', and the complete lack of security Twilight had placed on enchantments she thought none but herself and Spike would ever encounter, simply because no one else ever visited the library kitchen that she knew of - began their mass exodus of the kitchen that the disaster spread beyond a single room. The food, like most animate things with even the merest semblance of a mind, had a desire not to be consumed. That they knocked down books and scrolls and generally made the library into a paper snowstorm was almost incidental, especially as Twilight's and Spike's own labors had resulted in the same often enough that they knew how to navigate and clean up.
The primary driver, however, was Sanguine's desire to impress. This was not born out of any rational consideration of her impending fate. Indeed, such consideration would have strongly urged a far more humble approach, staying away until Twilight was ready to receive her - or perhaps to attempt escape. Twilight did not at the time possess a country-wide network of agents personally loyal to her and sworn to uphold her law, so Sanguine would probably have been safe once she left the vicinity of Ponyville so long as she did not stop for long until outside Equestria altogether. Instead, Sanguine unwisely decided to attempt to be as helpful to Twilight as she had attempted to be to Celestia.
Failing to recognize that Twilight was not Celestia, and thus had different needs and different measurements of "helpful", was perhaps the most fundamental of Sanguine's errors that morning. The difference between "helping" and "bribing" was often one of perception.
Just as Sanguine had finally recaptured the runaway cabbage - the last escaped ingredient, to her knowledge - Twilight's voice called, "Spike, what is going ON down there? It's just past dawn!"
"Err! Sanguine came over and wanted to help with breakfast," Spike called back.
"San-" Twilight teleported down, looking at the pegasus. "What. Are. You. Doing. Here?"
As any who live in arctic climes can relate, there are different calibers of ice. There is soft, fluffy ice in small flakes usually known as "snow". There is ice in the process of melting, or which has not had a chance to freeze too solidly. And then there is the hardest of ice, found only in the coldest of places, which some say can replace steel when it is too cold for steel to retain its strength. It was this that Sanguine felt in Twilight's voice, as if Twilight had had practice as a sword mare using words alone. Even Twilight was not immediately aware of her anger or its source, being whispered into her half-awake mind as it was.
"U-umm..." Sanguine scooted the cabbage container in Spike's direction, across the knee-deep collection of books and scrolls coating the floor. "Like he said, I wanted to help with breakfast."
"Get out," Twilight snarled. Why was it a good idea to snarl? Something in her mind said Sanguine's presence was in violation of all protocol, but since when did Twilight care about that?
"But-"
"GET OUT!" Twilight's horn glowed menacingly, but she did not pick up Sanguine yet. "Tell the others to be here with you at noon. I shall deal with you then."
Sanguine cowered. "I..."
"GO! AND RETURN AT NOON!" There was a faint echo to Twilight's voice.
The red pegasus bolted out the open front door, screaming for her life. Twilight slammed the door shut behind her.
Spike rapped the cabbage twice, ending its enchantment. "Don't you think that was a little much?"
Twilight turned a withering glare on him, eyes blazing sun-white as she bared her teeth.
Spike shielded his eyes. "Twilight?"
Her eyes faded to normal. "...kiiinda? Umm. Yeah, it's just me now. I was still daydreaming a little? Luna suggested..." She blinked, then silently mouthed a curse.
"Uh." Spike had been around Twilight enough to follow the chain to its logical conclusion. "D-does that mean Luna knows about...?"
"She does now." Twilight winced. "She was looking through my eyes. She'd been asking where Sanguine was, since Sanguine's not under Celestia's protection any more, and I guess I came down while she was still in my head." She reflected on the past few minutes. "Apparently trying to bribe judges used to be a more serious problem. Luna said she used to have a whole guild of ponies like Sanguine - in part to deal with ponies who tried to buy off the law, and officers who accepted bribes - and offered to set that back up. I told her no, but I don't think she liked that answer." After a moment's further reflection, she frowned. "No...she really didn't like that answer."
"Hrm. Celestia wasn't kidding about seeing Sangine as 'necessary'," Spike prompted.
"And Luna will be far worse." Twilight sighed. "Good thing she sleeps during the day, but I've no doubt she'll visit tonight. I can argue law with her if she shows up here in person, but she's probably got some argument overriding the change in custody. If she goes and talks to Fluttershy and Sanguine, or if she speaks in Sanguine's dreams, she'll probably convince Sanguine to just go with her. You think Celestia's tempted; for this Luna might just break out the hypnosis. We're lucky Luna was falling asleep when she and I saw Sanguine; if she'd been thinking clearly, she'd have tried to trick me into stalling until night." She shook her head and summarized, "We've got until Luna wakes up at sunset to take care of this."
"What are you going to do?" Spike wondered. "The law clearly says the punishment for murder is either death or a life of service, and I know you don't want to kill her."
"But if she's still serving tonight then Luna's going to..." Twilight stopped as she reflected on the morning's events.
"Uhh, Twilight? Why are you smiling?"
"Because I think Luna inadvertently showed me how to fix it. I was going to ask our friends for suggestions, but now I just need them as witnesses." Twilight looked around the library floor. "I'll need this cleaned up by the time they get here. Can you do that?"
"Sure!" Spike flung the cabbage container toward the kitchen and flexed his claws, preparing for another round of Reshelve Everything As Fast As You Can, a chore he had performed often enough he now made a game of it. "What are you going to do?"
Twilight's eye gleamed, complimenting her smile. "I need to practice being Luna."