Preheat oven to 400 degrees F. Prepare pie pastry; line pie plate with pastry. Place blackberries in unbaked pastry shell.
In a large bowl, combine eggs, sugar, flour, salt, vanilla extract, and cream; pour mixture over the blackberries.
Remove and oven and let cool slightly.
Pie is best served slightly warm.
Makes 4 servings.
* If using frozen berries, thaw and drain all juice before mixing.
** Sour cream may be substituted.
Blackberry Cream Pie Recipe: https://whatscookingamerica.net/fruit/blackberrycreampie.htm