Timeline Theory

Theory Concept
The Timeline Theory is the idea that the episodes of Lincoln Cooks are not uploaded in the chronological order that they were recorded. This theory is not necessarily true, but a few viewers have begun to speculate that the events of the episodes of Lincoln Cooks do not play out as simply as they appear to.

Evidence

 * In Episode One, Lincoln promises near the end of the video that in the next episode, he will "make [himself]. Out of Scooby Snacks. And...eat it. All. On camera." He also says "[t]une in next time for more Scooby Snack-related content." On top of both comments being Scooby Snack-related, it could be argued that neither promise is delivered on in Episode 2, where the closest thing to Scooby Snacks (let alone Lincoln made out of Scooby Snacks) are the Scooby-Doo-themed cookies. This would imply that Episode 2 either comes before Episode One, or that one or more episodes separate episodes one and 2.
 * Episode 2 starts with Lincoln saying the phrase "good morning", while Episode One starts with the phrase "hey guys, welcome back", both of which seemingly add credibility the theory that Episode 2 comes before Episode One chronologically. Later in the episode, Micah points out that Lincoln "learned [how to turn on a stove burner] last episode", which could possibly poke a hole in the Timeline Theory, but could also be referencing the chronological last episode that hadn't been officially released at the time.
 * Another potential snag for the Timeline Theory in this episode is Lincoln's promise in the outro that the next episode will include "more shmeat-related content". However, the Timeline Theory could actually be defended by this, because since the Timeline Theory places Episode 2 and Episode 3 Part 1 in chronological order and Lincoln mentions shmeat in that episode, the theory might even be strengthened by this fact.
 * However, something that indisputably does not happen in the next episode is Lincoln "mak[ing him]self out of shmeat". That doesn't look the greatest for the Timeline Theory, unless if the outro isn't meant to be taken seriously (which is possible). Alternatively, this may simply suggest that an episode exists between Episode 2 and Episode 3 Part 1 where Lincoln does make himself out of shmeat that simply hasn't been released yet.
 * On the topic of the outro and its relevance to the Timeline Theory: since the Timeline Theory doesn't dispute the release order of the episodes (since there is undeniable evidence for their release order), it wouldn't be impossible to suggest that the outro for Episode 2 was added from Episode One retroactively, even if Episode 2 was filmed long before Episode One.
 * In Episode 3 Part 2, when asked to "think of a food [he] hasn't made yet", Lincoln responds with "I haven't made me!" This would suggest that Episode 3 (parts 1 and 2), like Episode One, comes before the episode in which Lincoln makes himself (out of Scooby Snacks). Lincoln's son also says that Lincoln has made three types of food up until this point, but this is likely just an oversight on the son's part. The son likely confused the number of episodes with the number of dishes Lincoln has prepared, because even looking at the released episodes only, Lincoln has made five types of food (mac & cheese, hamburgers, Scooby Doo cookies, pumpkin pie, and pumpkin seeds). This is not credible enough to be considered valuable evidence against the Timeline Theory.
 * I Turned Myself Into A Cookie!!!!!! adds some credibility to the Timeline Theory, while also including some potential snags. For one thing, we finally see Lincoln make himself. While it is not out of Scooby Snacks, him making himself out of Scooby Snacks is mentioned in this video, which would seem to suggest that he planned to make himself out of Scooby Snacks this episode, but changed his mind on the spot. A potential snag this episode creates for the Timeline Theory is that Lincoln mentions that it's now a "new year". This creates an issue for the theory because, if Lincoln is suggesting that it is now 2021, this video would have to be the most recent, not only in terms of being uploaded at the time but in being recorded as well, due to its release date of January 3rd, 2021. However, this cannot be used immediately to dispell the Timeline Theory, as Timeline Theory supporters could easily argue that this was recorded at the start of 2020 (or really, any year prior to 2021), which would restore credibility to the theory. That is unimportant regardless, as I Turned Myself Into A Cookie!!!!!! is fourth, both in terms of uploads and according to the Timeline Theory.
 * I Turned Myself Into A Cookie!!!!!! also features more Scooby Snacks (one is even used on the Scooby-Doo cookie), which would hold true with Lincoln's statement regarding "more Scooby Snack related content".

Timeline
If the Timeline Theory is to be believed, the episodes would play out as follows: Unreleased first episode where Lincoln learns that measuremeants for butter are on the butter wrapping (as Episode 3 Part 1 refers to a "first episode" where Lincoln learned that), Episode 2 (starts with "good morning"), (possibly an unreleased episode where Lincoln fashions a shmeat version of himself, unless the Episode 2 outro isn't meant to be taken seriously), Episode 3 Part 1, Episode 3 Part 2 (hasn't made himself yet, "three foods" rebuttal is not solid enough evidence, contains "more shmeat-related content"), Episode One (starts with "welcome back", promises to make himself next time and have "more Scooby Snack related content"), I Turned Myself Into A Cookie!!!!!! (makes himself, more Scooby Snack related content).

Interestingly, if both this theory and the "Lincoln Is Dead" Theory are to be believed, this would imply that not only is Lincoln dead after eating the pumpkin pie in Episode 3 Part 2, but that he is also dead in Episode One and I Turned Myself Into A Cookie!!!!!!.