Try this Homemade Clotted Cream recipe, or contribute your own.
High-fat whipping cream containing 35 percent milk fat or higher does the essential structural work required to produce authentic clotted cream without stabilizers. Selecting pasteurized dairy rather than ultra-pasteurized versions remains critical because ultra-high-temperature processing alters the protein structures and prevents proper separation of the milk solids during the long heating phase.
Attempting to rush the process by increasing the oven temperature will scorch the dairy solids and ruin the batch entirely. Proper separation relies entirely on gentle, sustained heat over extended hours rather than active culinary intervention.