This is NOT my photo!
3 sticks margarine or butter, room temperature
1- 8 oz pkg cream cheese, room temperature
3 Cups sugar
6 large eggs
1 teaspoon vanilla
3 Cups flour
Nonstick cooking spray
Preheat oven to 350 degrees. With an electric mixer, beat butter and cream cheese until smooth. Add sugar; beat until light and fluffy, about 5 minutes. Add eggs, one at a time, beating well after each addition. Mix in vanilla. With mixer on low, add flour in two additions, beating until just combined.
Generously coat two 8 1/2-by-4 1/2- by-2 1/2-inch loaf pans (1 1/2 quarts each)* with cooking spray; immediately pour in batter (pan will seem full). Tap pans on work surface to eliminate any large air bubbles.
Bake until golden and a toothpick inserted in the centers comes out almost clean, 60 to 75 minutes (if the tops begin to brown too quickly, tent with aluminum foil).
Cool 10 minutes in the pan. Turn out the cakes; cool completely, with top sides up, on a wire rack.
*You can use a tube or bundt pan, if you do, increase cooking time by about 5 minutes. Let cool in pan 10 - 15 minutes then turn out on wire racks to cool.