Beat butter until soft, add brown sugar, beat until combined. Add eggs one at a time, beat only until combined before adding the next egg.
Pour fruit mixture into large basin, add creamed mixture, mix well use your hand for most efficient mixing. Add sifted flour; mix well.
Prepare a deep 20cm square or deep 23cm round cake tin by lining base and sides with three thicknesses of greeseproof paper. Bring lining paper 5 cm above the edges of the tin.
Spread mixture evenly into tin, bake in a slow oven. For 3 to 3 ½ hours
Brush top evenly with about 2 tablespoons extra Grand Marnier
Cover with aluminum foil, leave until cold before removing from tin.
To store cake remove foil and tin. Do not remove lining paper. Wrap cake securely in plastic food wrap to make air tight, store in a cool dark place, preferably in refrigerator.
This cake will keep for at least a year.
—Sandra Boyle A favourite that was taken to Sunset for many years