2 (1 ounce) squares chocolate
1 can sweetened condensed milk
1/2 teaspoon vanilla extract
1 3/4 cups graham cracker crumbs
1 cup chopped nuts

Melt chocolate in top of double boiler. Add sweetened condensed milk slowly and bring to a boil. Stir constantly, cooking until mixture thickens.

Remove from heat. Add vanilla extract, crumbs and one-half of nuts. Spread one-half of remaining nuts in the bottom of a buttered pan. Spread fudge on top of nuts and sprinkle with remaining nuts. Let stand overnight, then cut into squares.