Line a loaf pan with plastic wrap.
Soften the vanilla ice cream slightly at room temperature.
Spread the softened ice cream evenly in the lined loaf pan.
Cover and freeze the ice cream for at least 4 hours or until firm.
Prepare the chocolate ganache by heating heavy cream.
Pour the hot cream over chopped chocolate and let it sit.
Stir the mixture until smooth and add powdered sugar and vanilla extract.
Remove the ice cream from the freezer and unmold it.
Place the ice cream log onto a wire rack over a baking sheet.
Pour ganache over the ice cream log, ensuring it is fully covered.
Sprinkle the top with crushed nuts or sprinkles (optional).
Freeze the log for an additional 1-2 hours until firm.
Slice and serve the ice cream chocolate log.