I've been trying to work with the crafttweaker integration in 1.12.2 but have hit a roadblock. I want to be able to control the recipes that work in the Blast Furnace but nothing I try works. Worse yet, for the recipes that show up in JEI the input works but when the smelting is done there is no output. Here are a couple examples that I've tried:

mods.futuremc.BlastFurnace.removeRecipe(<futuremc:netherite_scrap>);
This doesn't work as it still shows up in JEI, the Ancient Debris is still accepted as an input and doesn't actually output anything (it smelts and then nothing shows up in the output).

mods.futuremc.BlastFurnace.addRecipe(<minecraft:iron_ore>, <minecraft:iron_ingot>);
This doesn't work either, the input is accepted but there is no output (note that I also removed the vanilla furnace recipe).