Preheat oven to 350°

Spray or butter and flour 2 loaf pans or 1 large bundt pan.

Sift flour, baking powder and salt into medium bowl. Set aside

Using electric mixer, cream together butter, shortening and sugar. Add eggs one at a time, beating until well blended after each one.

Add dry ingredients in three additions to butter mixture alternately with milk, beginning and ending with flour mixture. Beat at low speed just until blended after each addition. Mix in lemon juice and zest.

Pour batter into prepare pan. Bake cake until tester inserted into center comes out clean, about 55 minutes. Cool cake in pan for 15 minutes. Turn cake out onto rack and cool completely.