diff --git a/code/modules/food_and_drinks/kitchen_machinery/processor.dm b/code/modules/food_and_drinks/kitchen_machinery/processor.dm
index 8a6ecd57b00..7e1834288fe 100644
--- a/code/modules/food_and_drinks/kitchen_machinery/processor.dm
+++ b/code/modules/food_and_drinks/kitchen_machinery/processor.dm
@@ -33,7 +33,10 @@
 			continue
 		recipe = new recipe
 		var/list/typecache = list()
-		for(var/input_type in typesof(recipe.input))
+		var/list/bad_types
+		for(var/bad_type in recipe.blacklist)
+			LAZYADD(bad_types, typesof(bad_type))
+		for(var/input_type in typesof(recipe.input) - bad_types)
 			typecache[input_type] = recipe
 		for(var/machine_type in typesof(recipe.required_machine))
 			LAZYADD(processor_inputs[machine_type], typecache)
diff --git a/code/modules/food_and_drinks/recipes/processor_recipes.dm b/code/modules/food_and_drinks/recipes/processor_recipes.dm
index c135551db25..9246ba8afc0 100644
--- a/code/modules/food_and_drinks/recipes/processor_recipes.dm
+++ b/code/modules/food_and_drinks/recipes/processor_recipes.dm
@@ -1,6 +1,8 @@
 /datum/food_processor_process
 	/// What this recipe takes
 	var/input
+	/// Subtypes of what the recipe takes that it can't actually take.
+	var/list/blacklist
 	/// What this recipe creates
 	var/output
 	/// The amount of time this recipe takes.
@@ -15,10 +17,19 @@
 /datum/food_processor_process/meat
 	input = /obj/item/food/meat/slab
 	output = /obj/item/food/raw_meatball
+	blacklist = list(/obj/item/food/meat/slab/human,
+		/obj/item/food/meat/slab/corgi,
+		/obj/item/food/meat/slab/xeno,
+		/obj/item/food/meat/slab/bear,
+		/obj/item/food/meat/slab/chicken)
 	multiplier = 3
 
 /datum/food_processor_process/cutlet
 	input = /obj/item/food/meat/cutlet/plain
+	blacklist = list(/obj/item/food/meat/cutlet/plain/human,
+		/obj/item/food/meat/cutlet/xeno,
+		/obj/item/food/meat/cutlet/bear,
+		/obj/item/food/meat/cutlet/chicken)
 	output = /obj/item/food/raw_meatball
 
 /datum/food_processor_process/meat/human
@@ -72,6 +83,7 @@
 
 /datum/food_processor_process/potato
 	input = /obj/item/food/grown/potato
+	blacklist = list(/obj/item/food/grown/potato/sweet, /obj/item/food/grown/potato/wedges)
 	output = /obj/item/food/tatortot
 
 /datum/food_processor_process/carrot