Occasionally the collection of cards includes +1 cards, some I think may have gotten mis-filed and copied. This is nearly identical to the other sweet meats recipe though contains more? differently specified? butter/shortening/margarine. Its hard to say whether there's really a half-cup difference or its shortening vs. butter + margarine.
The construction instructions here are a bit more clear in suggesting a crust.
beaten until fluffy
1 1/2 cup
coarsely chopped nuts
Blend crust ingredients bake 20 minutes at 325F in a buttered 9x13" pan.
Pour egg mixture over baked crust. Bake 25 minutes more at 325F. Cool. Cut into squares.