Chocolate Eclair Cake

Directions

1. 1
   Combine pudding and milk and beat until thick.
2. 2
   Fold in Cool Whip.
3. 3
   Layer bottom of a 9 x 13-inch pan with graham crackers. Add layer of pudding mix.
4. 4
   Continue adding layers of graham crackers and pudding mix, but stop with graham crackers on top. Bring cocoa, evaporated milk and sugar to a boil, stirring constantly.
5. 5
   Let cool for 1 minute, then add margarine and vanilla flavoring.
6. 6
   Pour over cake.
7. 7
   Refrigerate overnight before serving.