What is the recipe Better homes and gardens published 50 years ago that requested most frequently?

Ingredients:

* 1 cup graham cracker crumbs

* 1/2 cup sugar

* 1/4 cup unsweetened cocoa powder

* 1/4 cup butter, melted

* 1 egg

* 1 teaspoon vanilla extract

* 1/2 cup chopped nuts (optional)

Instructions:

1. In a large bowl, combine the graham cracker crumbs, sugar, and cocoa powder.

2. In a small saucepan, melt the butter over low heat. Remove from heat and stir in the egg and vanilla extract.

3. Add the wet ingredients to the dry ingredients and mix until well combined.

4. Fold in the nuts, if desired.

5. Drop the mixture by tablespoons onto a wax paper-lined baking sheet.

6. Refrigerate for at least 30 minutes before serving.