Use immediately, or store for up to 2 weeks in a tightly sealed container in the refrigerator. Sauce Velouté – white stock-based sauce, thickened with a roux or a liaison. Korean food is usually served as lots of small plates presented together banquet-style. gochujang and ketchup pair very well! Sauce Hollandaise – an emulsion of egg yolk, butter and lemon or vinegar. Preparation. Sauce Espagnole – a fortified brown veal stock sauce. Combine all the ingredients in a bowl and mix well. The sweet and spicy red sauce is what makes this Korean fried chicken recipe so special. In this Korean fried chicken recipe, I used Heinz chili sauce instead of ketchup. The main ingredients typically include gochujang (Korean red chili pepper paste), ketchup, garlic, and corn syrup.