In a large heatproof bowl, combine gochugaru, Kashmiri chili powder, cayenne, and paprika. Whisk together until evenly mixed. Set aside near your cooking area. Pro tip: Mix the chilies in advance to ensure even distribution when the hot oil is added.

Add soy sauce, black vinegar, sugar, and salt to the chili mixture. Stir well to create a paste-like consistency. Pro tip: The liquid ingredients help prevent the chilies from burning when the hot oil is added.

Slice garlic cloves and shallots as thinly and uniformly as possible. Julienne the ginger into thin matchsticks. Pat all aromatics completely dry with paper towels. Pro tip: Uniform slicing ensures even cooking and prevents some pieces from burning while others remain undercooked.

Lightly crush Sichuan peppercorns using the flat side of a knife or mortar and pestle. This releases their aromatic oils more effectively. Pro tip: Crushing the peppercorns just before use maximizes their numbing sensation and fragrance.

In a heavy-bottomed saucepan, combine neutral oil and sesame oil. Heat over medium-low heat to 275°F (135°C). Add garlic, shallots, and ginger. Cook slowly, stirring occasionally, until golden and crispy, about 15-20 minutes. Pro tip: Low and slow cooking is crucial - rushing this step will result in burnt aromatics and bitter flavors.

Add Sichuan peppercorns, bay leaves, and cinnamon stick. Continue cooking for another 5 minutes until fragrant. The oil should bubble gently around the spices. Pro tip: The spices are done when they become deeply aromatic and the oil carries their fragrance throughout your kitchen.

Remove the saucepan from heat and let cool for 30 seconds. Carefully pour about 1/3 of the hot oil mixture over the chili paste, whisking immediately to prevent clumping. Pro tip: Adding the oil in stages prevents the chilies from burning and allows better control over the final texture.

Wait 1 minute, then add another third of the oil, whisking vigorously. Finally, add the remaining oil and aromatics, including all the crispy bits. Stir well to combine. Pro tip: The gradual addition creates the perfect balance of cooked and raw chili flavors that makes great chili crisp so complex.

Taste the mixture and adjust seasoning as needed. Remove bay leaves and cinnamon stick. Let cool completely at room temperature, stirring occasionally, about 2 hours. Pro tip: The flavors will continue to develop as it cools, so taste again before final storage adjustments.

Once cooled, transfer to clean glass jars, ensuring crispy bits are evenly distributed. The oil should cover the solids by at least 1/4 inch. Pro tip: Proper oil coverage prevents oxidation and extends shelf life significantly.