This recipe was written on a lined index card and found in a large collection, date unknown. I’ve typed it below along with a scanned copy (front side only).

Pecan Pie Surprise Bars

18 1/2 oz yellow or butter cake mix
1/2 c butter or margarine, melted
4 eggs
1/2 c brown sugar
1 1/2 c dark corn syrup
1 tsp vanilla
1 c pecans

Reserve 2/3 cup dry cake mix. Combine remaining cake mix with butter & 1 egg. Mix until crumbly. Press crumb mixture into a greased 13×9 pan. Bake 350° — 15 to 20 min. (golden brown).

Combine other 2/3 dry cake mix with 3 eggs, brown sugar, syrup, & vanilla. Beat (mixer) one to two min.

Pour over partially baked crust.

Sprinkle with pecans.

Return to oven 30-35 min (filling gets set)

Cool – cut into bars.

3 – dozen bars