Peanut Butter Marshmallow Squares

1 1/3 sticks butter
1 c. brown sugar
2 eggs, well beaten
2 2/3 c. crushed graham crackers
2/3 c. coconut
1/2 c. walnuts
1/2 c. peanut butter
2/3 pkg. sm. marshmallows

Cook in double boiler the butter, sugar and eggs for 30 minutes. Let cool a little, then add remaining ingredients leaving the marshmallows until last. Flatten in 8x12 inch pan. Refrigerate until firm, then cut into squares.