Creating a crafting recipe to modded items (create mod)

For some reason it will not allow me to use the recipe in game/ it isnt appearing. (yes the spaces are intentional i just want to test out if it will still let me use it outside of a crafting table
{   "type": "minecraft:crafting_shaped",   "pattern": [     "CD ",     "DC ",     "   "   ],   "key": {     "C": {       "item": "minecraft:iron_ingot"     },     "D": {       "item": "minecraft:andesite"     },     "result": {       "item": "create:andesite_alloy",       "count": 18     }   } }