"simmering hot" is a correct and usable phrase in written English.
You can use it to describe the feeling of something that is hot to the touch but not burning or scalding. For example, "The soup was simmering hot as I ladled it into the bowl."
The Thirty-eighth Parallel remains a simmering hot plate in an otherwise cold war.
Even novices can join in, and after the ice climbing, everyone can thaw out in Ouray's simmering hot springs.
A paper-towel-lined platter, wrapped in a linen dish towel, sat nearby on a large pot of simmering hot water waiting to receive the pancakes.
Superheated water surfaces here and the ground is dotted with simmering hot pools and bubbling geysers that give off billowing clouds of steam.
4. Drain the pancakes on paper towels that have been placed on a platter atop a saucepan of simmering hot water or keep warm in the oven.
On the other hand, the methane and water vapor could stem from an erupting volcano, a simmering hot spring, or even abiotic reactions between rock and cold ground water.
Turn the burner down to its low setting and simmer hot dogs for anywhere from 3 to 6 minutes, depending on how you like your hot dogs cooked.
And the dishes appeared, with no words exchanged, on a plank table, as a grandmother minded a pot of sour fish soup simmering over hot coals.
Sabretts are a garlicy all-beef frank in natural casing often simmered in hot water, a "dirty water dog", so named because the water becomes murky with flavor extracted from the sausages.
The buffet was piled high with excellent tuna sashimi; rich, marbled Hokkaido beef; and simmering DIY nabe (hot pots).
Place the jar seals and rings in a smaller pot of hot, simmering water.
