• In a glass bowl, combine the heavy whipping cream and cultured buttermilk, ensuring they are well mixed. Cover the bowl loosely with a kitchen towel.  Allow the mixture to sit at room temperature for 24 hours.
• After 24 hours, transfer the bowl to the refrigerator and let it thicken for 2 to 3 days.

Notes:

• Ensure your buttermilk is labeled as "cultured" to achieve the desired result.
• Once prepared, the crème fraiche can be stored in the refrigerator and will remain fresh for up to 2 weeks.
• Crème fraiche can be a versatile addition to various recipes. It can be used cold in dressings or dessert preparations. For a delightful treat, sweeten it with a sprinkle of sugar and dollop over freshly sliced strawberries. Alternatively, consider using it as a replacement for regular whipped cream in recipes. Its unique composition allows it to retain its flavor and consistency even when exposed to boiling temperatures.