Combine chocolate wafer crumbs and 1/3 cup melted butter; firmly press on bottom and sides of a 9-inch tart pan or pieplate. Bake at 350F for 6 to 8 minutes.

Cream 1/2 cup softened butter; gradually add brown sugar with the electric mixer at medium speed until blended. Add the eggs, one at a time, beating after each addition. Stir in the melted chocolate, instant coffee granules, vanilla extract, flour and chopped pecans. Pour into the prepared crust. Bake e at 375F for 25 minutes. Remove from oven and cool completely on a rack.

Before serving, pipe sweetened whipped cream on each piece and drizzle with chocolate syrup. Garnish with cherries and/or mint if desired.