1 (15 1/2 oz.) can crushed pineapple
4 c. blueberries
1 box yellow cake mix
1 c. chopped pecans
1 1/2 sticks butter, cut in pats

Pour pineapple in bottom of 9 x 12 pan. Pour blueberries in pan. Pour dry cake mix on top of blueberries. Sprinkle pecans over cake mix. Place butter pats over cake mix.

Bake at 350°F for 40 minutes. Serve warm with ice cream. Top with Cool Whip (optional).