Christmas Graham Fudge

2 cups semisweet chocolate chips
1/4 cup butter or margarine
2 1/2 cups graham cracker crumbs
1 1/2 cups almonds or pecans, chopped
14 oz sweetened condensed milk
1 tspn vanilla

melt chocolate chips and butter together until smooth.  In large bowl combine graham crumbs and nuts.  Stir in sweetened condensed milk and vanilla until crumbs are moistened, then stir in chocolate mixture.  Spoon into greased 9x13 baking pan.  Let stand at room temp for 2 hours before cutting into squares.