Pour flour, sugar, salt, milk, eggs, and butter into a blender.Puree until mixture is smooth, about 30 seconds. Let batter sit for 15 minutes before you use it.Heat a 12-inch nonstick skillet on medium heat. Lightly coat with butter. Add â…“ cup batter and swirl to completely cover bottom of skillet. Cook until underside of crepe is golden brown, 2-3 minutes.Loosen edge of crepe with a spatula, then with your fingertips, quickly flip. Cook 1 minute more. Slide crepe out of skillet and repeat with remaining batter.Pour the heavy cream into a mixer fitted with the whisk attachment. Beat on medium-high until soft peaks form. Add vanilla and sugar and beat for another 2 minutes or until stiff peaks form.Fold the crepes into triangles and drizzle with nutella (you may need to warm the nutella first if it's too thick to drizzle). Top with whipped cream and berries. Serve immediately.