diff --git a/cf-lib/data/Recipe.lua b/cf-lib/data/Recipe.lua
index 52e453b..4bbd0f1 100644
--- a/cf-lib/data/Recipe.lua
+++ b/cf-lib/data/Recipe.lua
@@ -43,8 +43,9 @@ end
 
 --- Adds an ingredient to the recipe
 --- @param ingredientName string The name of the ingredient
---- @param amount number The amount of the ingredient
+--- @param amount number The amount of the ingredient (default: 1)
 function Recipe:addIngredient(ingredientName, amount)
+    amount = amount or 1
     local ingredientType = data.raw.item[ingredientName] and "item"
         or data.raw.module[ingredientName] and "item"
         or data.raw.fluid[ingredientName] and "fluid"