Line 8x4-inch loaf pan with plastic wrap; smooth out all wrinkles. Set aside.
To prepare vanilla pudding, in medium saucepan combine 1 1/4 teaspoons gelatin and 1 cup of the milk; let stand 2 minutes to soften. Add remaining 1 1/2 cups milk and vanilla pudding mix. Cook over medium heat until mixture comes to a boil, stirring constantly. Remove from heat; add white baking bar and stir until melted. Place plastic wrap over surface of pudding; let stand15 minutes to cool. Meanwhile, repeat process to prepare chocolate pudding.
To assemble, randomly spoon each mixture into lined pan. Using narrow spatula or knife, gently swirl through mixture to marble. Cover with plastic wrap; refrigerate at least 3 hours before serving. Unmold onto serving plate. Garnish with whipped cream and chocolate curls. Cut into slices or spoon
mixture to serve. Store in refrigerator.