Process chocolate wafers in a food processor until finely crushed. With processor running, pour 1/2 cup melted butter through food chute; pulse just until crumbs are moistened. Press crumb mixture into a 9-inch tart pan.
Bake at 350° for 8 minutes. Cool crust while preparing filling.
Combine 1/2 cup whipping cream, corn syrup, and 2 tablespoons butter in a small saucepan. Bring to a boil over medium heat, stirring constantly. Remove from heat; add chocolate morsels, stirring until smooth. Pour chocolate mixture into crust (crust will be warm). Cool 1 hour.
Arrange 2 cups raspberries, stemmed side down, in concentric circles on top of filling. Chill, uncovered, 1 hour or until firm. Serve with dollops of sweetened whipped cream. Garnish, if desired. Store in refrigerator.