Data pasted into the input is treat as a file if it's over the IO threshold

src/core/Chef.js

@@ -80,7 +80,7 @@ Chef.prototype.bake = async function(input, recipeConfig, options, progress, ste
     // Depending on the size of the output, we may send it back as a string or an ArrayBuffer.
     // This can prevent unnecessary casting as an ArrayBuffer can be easily downloaded as a file.
     // The threshold is specified in KiB.
-    const threshold = (options.outputFileThreshold || 1024) * 1024;
+    const threshold = (options.ioDisplayThreshold || 1024) * 1024;
     const returnType = this.dish.size() > threshold ? Dish.ARRAY_BUFFER : Dish.STRING;
 
     return {