mc_rebalance/data/minecraft/recipes/diamond_helmet.json

{
	"type": "minecraft:crafting_shaped",
	"category":"equipment",
	"pattern": [
		"111",
		"121"
		],
	"key": {
		"1":{"item":"minecraft:diamond"},
		"2":{"item":"minecraft:magma_cream"}
	},
	"result": {
		"item":"minecraft:diamond_helmet"
	},
	"show_notification":true
}