Wash and cut the cauliflower into small florets. Pat dry thoroughly.
In a mixing bowl, combine the flour, paprika, salt, garlic powder, black pepper, and softened butter.
Gradually whisk in the sparkling water and regular water until a smooth, slightly thick batter forms.
Spread the panko breadcrumbs in a shallow tray.
Dip each cauliflower floret into the batter, letting any excess drip off.
Roll the coated floret in panko breadcrumbs until evenly covered.
Place on a plate or tray.
Heat oil in a pan over medium heat (enough to shallow fry).
Fry the coated florets in batches for 3–4 minutes per side, or until golden brown and crispy.
Remove with a slotted spoon and drain on paper towels.
In a small bowl, mix mayonnaise and sweet chilli sauce until smooth.
Drizzle the dynamite sauce over the fried cauliflower bites, or serve on the side for dipping.
Garnish with chopped spring onions or sesame seeds if desired.