Use high-quality cocoa powder for the best flavor. Chill bowl and beaters before whipping cream for maximum volume. For a firmer crust, brush with melted chocolate before filling. Allow pie to chill overnight for best texture. Use a serrated knife for cleaner slices. Variations include peanut butter swirl, espresso addition, chocolate ganache topping, fruit garnish, nutty crunch, and gluten-free crust option. Store leftovers refrigerated for up to 3 days; do not freeze.