Good-Cooking - Chocolate Irish Cream Cheesecake

Ingredients

• 1 cup chocolate wafer crumbs (about 18 cookies)*
• 1/4 cup butter, melted
• 1/2 teaspoon ground cinnamon
• 24 ounces cream cheese, softened
• 1 (8 ounce) container dairy sour cream
• 1 cup granulated sugar
• 1 (8 ounce) package semisweet chocolate, melted and cooled
• 3 eggs
• 1/3 to 1/2 cup Irish cream liqueur
• 2 tablespoons whipping cream or milk
• 2 teaspoons vanilla extract
• Fresh raspberries (optional)
• 1/3 cup semisweet chocolate pieces, melted (optional)