Replacing recipes not working

[Nysse01]

So i am trying to replace iron chestplate recipe but it only chooses the vanilla and i have to disable vanilla in game to be able to use my recipe.

Is something wrong? That should work right.
(the thing that is blurred out is my world name)

[Placid-Storm]

We need to see the actual contents of the json files. I'm more familiar with MineTweaker/CraftTweaker but just to check, did you disable the vanilla recipe and create a new recipe?

[Placid-Storm]

The following should be a vanilla iron chestplate recipe. Make sure all the commas are correct. I was going to use code brackets but it doesn't keep my line spacing.

{
"type": "crafting_shaped",
"pattern": [
"# #",
"###",
"###"
],
"key": {
"#": {
"item": "minecraft:iron_ingot"
}
},
"result": {
"item": "minecraft:iron_chestplate"
}
}

[SwordsmanJoe]

I've also run into this problem, and as far as I can tell, you need some extra code for advancements. For example: I want to make magma blocks harder to make for a pack that allows you to smelt them into quartz ore.
{
"type": "minecraft:crafting_shaped",
"pattern": [
"#N#",
"#E#",
"#D#"
],
"key": {
"#": {
"item": "minecraft:magma_cream"
},
"N": {
"item": "minecraft:netherrack"
},
"E": {
"item": "minecraft:ender_pearl"
},
"D": {
"item": "minecraft:diorite"
}
},
"result": {
"item": "minecraft:magma_block",
"count": 2
}
}
That's the code I'm using, but the default recipe is still possible. Compare that to the VanillaTweaks on YouTuber Xisuma's page which work fine. For example, making 12 trapdoors at a time rather than only two.

[kingofdeamons]

can anyone tell me why this doesn't seem to work

{
"type": "minecraft:crafting_shapeless",
"ingredients": [
{
"item": "minecraft:gravel"
}
],
"result": {
"id": "minecraft:sand",
"count": 1
}
}