To make a lot of short, dry, sharp sounds. (Cambridge Dictionary)
If something crackles, it makes a rapid series of short, harsh noises. (Collins Dictionary)
To make small sharp sudden repeated noises. (Merriam – Webster)
To show animation: Sparkle. (Merriam – Webster)
To crush or crack with snapping noises. (Merriam – Webster)
Make a rapid succession of short sharp noises. (Oxford Dictionaries)
Give a sense of great tension or animation. (Oxford Dictionaries)
How to make perfect pork crackling.