Yes, that's right. Pad thai. There are probably a few people out there scratching their heads, wondering what the heck ketchup would be doing in pad thai, or Asian cuisine in general. Well, ever wonder how pad thai noodles get that slightly orange tint? Or that unmistakable tang? That's right — it's not just vinegar. There's ketchup in the sauce that coats the noodles. It's really not that weird — pad thai is an Americanized favorite anyway.