She's 11 and she's already taught herself how to boil an egg (a damn good soft-boiled one at that) and cook rice. I started teaching myself how to cook when I was 14 and I'm doing a commercial cooking program in post-secondary, so I've already been teaching her knife skills and some basic stuff but I haven't had many chances to actually cook with her due to living a couple hours away. I'll be home a bunch over the next month, so that's prime time to show her a few dishes.
I have a couple of ideas, like fried rice and a couple different kinds of soup, but I also want to demonstrate just how creative she can get with cooking and introduce her to food she might not otherwise try. The recipes will have to be relatively easy so I don't overload her, but I want her to have fun too! I'm willing to go out and pick up ingredients specifically for this.
I'd say, quick breads are a good starting point.
Tortillas are like, three ingredients and a hot skillet.
Biscuits are like, the same three ingredients that Tortillas have with some leavening added, maybe an egg/binder. You've got your choice of drop biscuits or the more complicated/fancy biscuits that you roll out and fold over the dough multiple times for. You can also add some extra flour to the drop biscuits and pat them out into a more typical biscuit shape.
From there you've got your cinnamon buns, which is pretty much just a biscuit recipe rolled flat and then filled with the cinnamon/sugar/nuts/fruit syrup(slurry?) stuff. You can can also replace the cinnamon/sugar with chocolate syrup, and that's pretty good.
Biscuit recipe can also work as a quick "pizza"ish crust.
Cornbread is mostly a biscuit recipe with cornmeal and some more sugar. Which can branch off into savory (add corn/jalapenos), sweet (add more sugar), and just boring old yellow cornbread (reduce the sugar that the recipe calls for).