1. Put sugar, margarine, milk and egg in saucepan stirring continually until it comes to a full boil. Boil for one minute then remove from heat.
2. Add crumbs, walnuts, coconut and vanilla.
3. When cool, line an 11 x 8 pan with whole graham wafers. 
4. Pour filling over the wafers. Cover mixture with whole wafers and ice with butter icing. 

To prepare Butter Icing:

1. Cream together 1/2 cup butter with 3/4 teaspoon almond or vanilla extract until fluffy. 
2. Blend in 1 to 2 cups confectioner's sugar, half a cup at a time, adding 2 to 3 tablespoons milk as you blend, until the icing reaches the desired consistency.