should work

var defaultKilnCookTime as int = 200;
	var defaultKilnCookTimeRecipes as IItemStack[][IItemStack] = {

	/*
		Clay Kiln

		The following script is heavily based on the one made for the modpack SevTech Ages made by the DarkPacks team as a base for the custom recipes used in Rebirth of the Night, all the credit goes to them
		Source: https://github.com/DarkPacks/SevTech-Ages/blob/master/src/scripts/crafttweaker/integrations/mods/primalTech.zs

		mods.primaltech.ClayKiln.addRecipe(IItemStack output, IIngredient input, int cooktime);
	*/


		<betterwithmods:cooking_pot:1>: [
			<betterwithmods:unfired_pottery>, 500
		],
		<ceramics:clay_barrel:0>: [
			<ceramics:clay_barrel_unfired:0>,200
		],
		<betterwithmods:planter>: [
			<betterwithmods:unfired_pottery:1>, 500
		],
		<betterwithmods:urn>: [
			<betterwithmods:unfired_pottery:2>, 200
		],
		<betterwithmods:vase>: [
			<betterwithmods:unfired_pottery:3>, 300
		],
		<minecraft:cake>: [
			<betterwithmods:raw_pastry>, 200
		],
		<ceramics:clay_barrel:1>: [
			<ceramics:clay_barrel_unfired:1>,200
		],
		<ceramics:clay_bucket:0>: [
			<ceramics:clay_bucket_block:0>,200
		],
		<minecraft:brick:0>: [
			<minecraft:clay_ball:0>,200
		],
		<minecraft:pumpkin_pie>: [
			<betterwithmods:raw_pastry:2>, 200
		],
		<minecraft:cookie>*8: [
			<betterwithmods:raw_pastry:3>, 200
		],
		<minecraft:bread>: [
			<betterwithmods:raw_pastry:4>, 200
		],
		<betterwithmods:apple_pie>: [
			<betterwithmods:raw_pastry:5>, 200
		],
		<minecraft:netherbrick>: [
			<betterwithmods:unfired_pottery:5>, 50
		],
		<minecraft:stone:0>: [
			<minecraft:cobblestone:0>,200
		],
		<minecraft:stone:1>: [
			<betterwithmods:cobblestone:0>,200
		],
		<minecraft:stone:3>: [
			<betterwithmods:cobblestone:1>,200
		],
		<minecraft:stone:5>: [
			<betterwithmods:cobblestone:2>,200
		],
		<ceramics:unfired_clay:5>: [
			<ceramics:unfired_clay:4>,200
		],
		<minecraft:blaze_powder>: [
			<minecraft:fire_charge>, 500
		]
	};

	for output, inputs in defaultKilnCookTimeRecipes {
		for input in inputs {
			ClayKiln.addRecipe(output, input, defaultKilnCookTime);
		}}