Heat oven to 375°F. Remove pie crust from pouch; place flat on ungreased large cookie sheet.
In medium bowl, mix 2/3 cup pecans, the brown sugar and butter. Sprinkle over half of pie crust to within 3/4 inch of edge. Brush edge with water; fold pie crust over filling. Move kringle to center of cookie sheet. Press edge with fork to seal; prick top with fork.
Bake 17 to 22 minutes or until golden brown. Cool 5 minutes.
In small bowl, mix powdered sugar, vanilla and enough milk until smooth and desired drizzling consistency. Drizzle over warm kringle. Sprinkle with 3 tablespoons pecans. Cool completely, about 30 minutes. Cut into wedges.