3 eggs
1/3 cup white sugar
1/2 cup all-purpose flour
3/4 teaspoon baking powder
2 teaspoons baking soda
1 teaspoon salt
1 cup margarine, melted
1 cup milk
1/2 cup vegetable oil
2/3 cup confectioners' sugar
1 teaspoon vanilla extract
1/2 cup chocolate chips
1/2 cup chopped walnuts
Preheat oven to 375 degrees F (190 degrees C). Grease muffin cups or line with paper muffin liners. Stir together eggs, sugar, flour, baking powder, baking soda, salt and margarine.
In a large bowl, cream together the margarine, milk, oil, confectioners' sugar and vanilla. Beat until light and fluffy, about 5 minutes. Stir egg mixture into cream cheese mixture alternately with the melted margarine. Spoon batter into prepared muffin liners.
Bake in preheated oven for 20 minutes, or until a toothpick inserted into center of muffin comes out clean. Cool on a wire rack.