Prepare sauce: In a small saucepan combine sugar and cornstarch; stir in orange juice. Cook and stir over medium heat until sauce is clear and thickened, about 5 minutes. Stir in 1 cup blueberries and return to a boil. Boil and stir for 1 minute.

Prepare filling: In a mixing bowl, beat cream cheese until light. Add confectioners sugar and vanilla. Beat until smooth and creamy.

Assemble wraps: Spread a tortilla with about 2 tablespoons of the cheese mixture. Place about 6 frozen blueberries across the center of each tortilla. Roll jelly-roll style. Repeat with remaining wraps. In a medium skillet, melt 1 tablespoon butter over medium heat; place half of the wraps seam side down in skillet and cook turning occasionally until evenly browned, about 3 minutes. Remove from pan and keep warm while cooking the remaining wraps.

Serve topped with hot blueberry sauce.