In a mixing bowl, whisk together the flour, eggs, milk, melted butter, and salt until the batter is smooth and lump-free. Let it rest for 30 minutes.
Heat a lightly buttered nonstick pan over medium heat. Pour in a thin layer of batter and swirl to coat the pan evenly.
Cook each crepe for 1 to 2 minutes on the first side, then flip and cook briefly on the other side until lightly golden. Stack the cooked crepes and cover to keep warm.
In a separate bowl, whip the heavy cream, mascarpone, vanilla extract, and powdered sugar if using, until soft peaks form.
To assemble the Raspberry Vanilla Cream Crepes, spoon or pipe the vanilla cream onto each crepe and top with fresh raspberries.
Fold or roll the crepes, then dust with powdered sugar and drizzle with raspberry coulis or melted chocolate if desired.
Garnish with mint leaves and serve immediately for the best texture and freshness.