The phrase "fiery hot" is correct and usable in written English.
You could use it to describe food that is extremely hot in taste, a place that is extremely hot in temperature, or intense emotions such as anger. For example, "I took a bite of the spicy wings and they were fiery hot!".
They're salty, fiery hot, and fresh.
I also left all the fiery hot condiments behind.
It probably contains kimchi and is likely to be fiery hot.
Jerk chicken, fiery hot and caked with seasonings, ranks second in sales.
Buffalo wings were so slathered with fiery hot sauce that no chicken flavor could be detected.
But this is superior wat, fiery hot, multi-flavoured, and utterly delicious.
In a little while I was happily dining on balls of Lao sticky rice and fiery-hot minced meat, listening to B. B. King sing the blues.
The portly proprietor had just finished a batch of fried bananas, and she hurried out with a sample as we waited for our lunch of fiery-hot fish and squid soup.
Continue on and enjoy the delicate salad greens lightly dressed with a mustardy vinaigrette, the tender-as-butter braised short ribs and the pieces of octopus glistening with fiery-hot chili paste.
She copes with the less-than-welcome attentions of a spoiled and materialistic Buddhist monk, has a near romance with a charismatic expat and tries, without success, to develop a liking for emadatse, the "yak-cheesy, fiery-hot chili stew" that locals consume three times a day.
On the shop floorin full view of visitors to the wonderful Corning Museum of Glass in Corning, New Yorkbeefy artisans use pool cuelike blowpipes to shove semimolten glass through furnace "glory holes". The fiery-hot glop is then blown, twirled and shaped into brilliant figurines, vessels and ornamental designs.
