Are these blocks doomed?
 

Sometime ago, I made some basket quilt blocks and put them away. I just got them out. They are made with white background fabric. Due to poor lighting in the room where I was working at the time, it appears that the iron may have been a little warm at times. Are these blocks doomed or is there a solution?

not seeing them it's hard to tell....but sometimes 'yellowing' does wash away- so finish them up and launder your project-

Couldn't say for sure without seeing them. But, if the iron was too hot, they may be scorched. I don't know a solution for that. Sorry I'm not much help.

I don't think you can tell from the picture that the side strip is discolored.

I have used Retroclean for removing yellowing in linens, but I am not sure about scorching

Try a little hydrogen peroxide and see if it lifts a little. I read that somewhere and I thought I'd seen it on the board!

If you were using starch, and the starch scorched, they will likely wash up just fine. If the fabric itself is scorched, they may not clean up. Hoping you used starch!!!!

Are you attached to them? If not, don't feel bad about cutting your losses. Sometimes you just have to say "live and learn" or "oh well, I survived." But if the fabric is not scorched, you could try the methods advised above. If it is, it's a lost cause.