When Taco Bell launched in Korea, not every customer was won over by the menu. So, the chain leaned heavily on familiar flavors, launching the Bulgogi Taco in 2015.
Bulgogi beef, a local favorite, is folded in with classic Taco Bell toppings in a soft flour tortilla to create a taco that is significantly spicier than what you'll find on an American menu. While Taco Bell has found that Americans customers like to be able to add their own hot sauce, via packet, many in other countries questioned why they were being served an incomplete meal.
So, Taco Bell turned up the heat to fit local tastes and kept the sauce packets in the US.