In a large heatproof bowl, combine chilli powder (or flakes), garlic and sugar.
Heat oil in a small saucepan until very hot. Oil is hot enough when small ripples start to form on the surface of the oil or it starts to smoke a little.
Carefully, pour hot oil into the bowl of chilli garlic mixture. Mix well with a pair of chopsticks then stir in soy sauce, black vinegar and sesame oil. Divide this chilli garlic sauce into two large serving bowls.
Cook noodles according to packet instructions. Usually, the noodles take about 3 minutes to cook.
Add cooked noodles into the bowl of prepared chilli garlic sauce. Top with coriander, spring onions and crispy chilli oil (if using) then serve.
Mix thoroughly before eating.
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Notes
1. Dried wheat noodles - can be found at Asian grocers and are sold in various widths, all are good to use. Can use fresh wheat noodles (benefit: better texture) too which are available in the fridge section of Asian grocers where dumpling skins are.2. Chinese chilli powder - available at Asian grocers and can use chilli flakes if that's what you've got at home. The level of spiciness is variety dependent so adjust the quantity to suit your tastebuds.Making ahead - If you wish to prepare in advance, make the chilli garlic sauce (up to instruction #3) then set it aside. Only cook the noodles when you're about to eat then top with the fresh greensLeftovers - This dish is best served as soon as it's made. Leftovers last up to 4 days in the fridge stored in an airtight container.Easy serving suggestions/pairing: