Place softened butter into a large bowl and mix on medium 1-2 minutes.
Add dry ingredients to bowl and mix for about 30 seconds
Next, add milk, oil, vanilla and eggs and mix on medium-high for 1 minute.
Pour batter into greased and floured cake or muffin pans.
Preheat oven to 350°F. Baking the 9-inch cake pans 20-25 minutes or until a toothpick inserted in the middle comes out clean. If you're making cupcakes, start checking them after about 15 minutes. The mini cupcakes were perfect at the 17 minute mark.
Cool before frosting.