The issue: crafttweaker script is not erroring, and the crafttweaker log reports that the recipe was successfully removed, but the recipe persists.

Trying to remove the steel ingot recipe in the Arc Furnace:
mods.immersiveengineering.ArcFurnace.removeRecipe(thermalfoundation:material:160);
I have talked with the developer of crafttweaker and he directed me here, since IE adds its own crafttweaker support

https://pastebin.com/ZDAvMV23 line 22 of crafttweaker.log should prove that the recipe is not erroring, though I am still able to craft the ingot using the arc furnace

Haha ok ok ok I apologize I was desperate. I actually talked to another developer and figured it out. Apparently, even though - what I'm assuming was unidict's doing - the recipe produced a thermal steel ingot, the removal still needed to specify the IE steel ingot, which worked.

Could you maybe actually read the contribution guidelines and provide the information we ask for? Thanks =)