dianna-this is the recipe I have for "all-time favorite puff pudding" from a post grape nuts pkg...not sure if it's the one for which you're looking, but i hope it helps.

ALL-TIME FAVORITE PUFF PUDDING
Source: Grape Nuts Box
Makes 4-6 servings

1/4 cup butter
1/2 cup. sugar or honey
1 tsp. grated lemon rind
2 egg yolks
3 Tbsp. lemon juice
2 Tbsp. flour
1/4 cup post grape nuts cereal
1 cup milk
2 egg whites, stiffly beaten

Preheat oven to 325 degrees F. Grease a 1 quart baking dish.

Thoroughly cream butter with sugar and lemon rind. Add egg yolks; beat until light and fluffy. Blend in lemon juice, flour, cereal, and milk. Fold in beaten egg whites. Pour into prepared baking dish; place the dish in a pan of hot water.

Bake at 325 degrees for 1 hour and 15 minutes or until top springs back when lightly touched. When done, pudding has a cake-like layer on top with custard below.

Serve warm or cold with cream or whipped topping, if desired.