Trim and cut the cauliflower into bite-size florets.
Bring a large pot of water to a boil and blanch the florets for 5 minutes, then drain well and let steam-dry briefly; do not overcook.
Crush the corn flakes to a fine, breadcrumb-like texture using an immersion blender bowl or food processor; transfer to a shallow plate.
In a shallow bowl, whisk together the yellow corn flour, all-purpose or rice flour, corn starch, salt, and black pepper. Gradually pour in the dairy-free milk and whisk to a smooth batter that is pourable like pancake batter; add a teaspoon of water if it becomes too thick.
Dip each cauliflower floret into the wet batter, coating evenly (fingers work well), then transfer to the crushed corn flakes and press gently so the flakes adhere to the surface.
Heat sunflower oil in a skillet or heavy pot over medium-high heat. Test by dropping a bit of coating into the oil; it should sizzle.
Carefully add the coated florets to the hot oil in batches without overcrowding. Fry 3–4 minutes, turning as needed, until golden and crispy. Remove with a slotted spoon or tongs and drain on paper towels.
In a large pan, melt the dairy-free butter over medium heat, then add Frank's Red Hot and maple syrup and stir until fully combined and bubbling.
Add the fried cauliflower to the sauce and toss gently to coat each piece evenly, then serve immediately.