Preheat oven to 400 degrees.
Cut pastry into 4 strips, 2 1/2- inches wide.
Cut each strip crosswise into thirds.
On an ungreased baking sheet, arrange strips and bake until done.
Prepare pudding according to package directions, substituting sour cream for 1 cup milk.
Cut pastry rectangles in half, making a top and a bottom. Spoon pudding on bottom half and top with the other.
Blend sugar and milk until spreading consistency. Spread on top and drizzle with chocolate.
Serve immediately.
Approximately 15 servings.