https://www.steamcommunity.com/id/kvwi
Here's an easy recipe for a (vegan, actually, but you won't notice) chocolate cake that only needs a single 9x13 Pyrex baking pan, a fork, and measuring cups. It's incredibly simple, very moist, and the leavening comes from the same reaction you used in middle school chemistry to make volcanos.
Wacky Cake
Preheat oven to 350 Fahrenheit
In a 9x12 or 9x13 pan, mix together ->
3C Flour
2C Sugar
2t Salt
2t Baking Soda
3/4C Cocoa
After mixing, add ->
1C Neutral Oil (Canola, Peanut, things of that nature)
2C Water
Vanilla extract (Around a tablespoon is a nice baseline, but I almost always add extra vanilla to stuff, no matter what I'm baking.)
2T Vinegar
Mix again, trying to get all of the stuff on the sides and bottom of the pan incorporated, but don't mix it too much, it will be just fine without you being a helicopter parent to it.
Once it's mixed, slide it into that oven, and bake for 30-40 minutes or until done (the toothpick test works here. Just insert a toothpick into the center of the cake, and if it comes out mostly clean, you're good.)
Let it cool, and then dust it with powdered sugar, make a simple glaze, or just eat it as-is. You will not regret making this recipe, I promise. I typed this whole thing out for you anyway. Pick me up.