1 pkg. Duncan Hines Devil's food cake mix
1 c. brown sugar
1/2 c. cocoa
2 c. water
2-3 c. miniature marshmallows
1 c. pecans or walnuts, chopped

Combine brown sugar, cocoa, and water; mix well. Pour in 13 x 9 buttered and floured pan. Place marshmallows evenly on top. Be sure to cover all. Top with nuts.

Make cake batter following package directions. Pour into pan. Bake at 350 degrees for 50 minutes. Test with fingers for doneness. Top with Cool Whip.