Brownie Marshmallow Swirl

1 family size brownie mix
2/3 c. oil
1/4 c. water
2 eggs
7 oz. jar marshmallow creme
1/3 c. chocolate fudge frosting

Heat oven to 350. Prepare brownie mix as directed on package using oil, water, and eggs. Pour in 9x13 sprayed pan for the amount of time listed on box. Cool. Spread marshmallow creme over brownies. Microwave frosting in bowl on high for 15 seconds. Stir until smooth. Drizzle over marshmallow creme. Swirl with tip of  knife. Chill 15 minutes until set. Cut into bars. YUM!