1 Preheat oven to 250 degrees F (120 degrees C). Grease a 10 inch tube pan and line it with parchment paper.
2 In a large bowl, cream butter and sugar until light and fluffy. Add eggs, one at a time.
3 Sift together 3 cups of the flour, baking powder and salt. Mix remaining flour with fruit and nuts. Stir into batter. Add vanilla.
4 Pour into tube pan. Bake at 250 degrees for 3 hours. Cool in pan.