It only takes one ingredient plus approximately 25 hours to make clotted cream at home using either of these methods.
Ingredients
2 pints (not ultra-pasteurized) heavy whipping cream
Instructions
Instant Pot Method:
Pour cream into the Instant Pot; close lid; turn to YOGURT setting. Press button until it says BOIL.
When machine beeps, press KEEP WARM button; leave for 10 to 12 hours.
Turn machine off; remove pot. Let cool to room temperature without disturbing. When cool, refrigerate for 12 hours.
Remove pot from refrigerator. Scoop off thickened layer of cream, leaving thin liquid behind*. Lightly whip the cream, and spoon directly into a glass jar with lid; or whip the thick layer with the thin liquid to make it creamier, but not as thick as clotted cream. Refrigerate for up to 2 weeks.
Oven Method:
Heat oven to 180°F.
Pour cream into an 8-inch square glass baking dish. Place dish, uncovered, in oven. Leave undisturbed for 12 hours.
Remove dish from oven. Let cool to room temperature without disturbing. Cover with plastic wrap; refrigerate for 12 hours.
Remove dish from refrigerator. Scoop off thickened layer of cream, leaving thin liquid behind*. Lightly whip the cream, and spoon directly into a glass jar with lid; or whip the thick layer with the thin liquid to make it creamier, but not as thick as clotted cream. Refrigerate for up to 2 weeks.
Notes
*If you wish, you can use the thin liquid for making scones.
Recipe by TeaTime Magazine at https://teatimemagazine.com/clotted-cream-a-cream-tea-essential/