In a large bowl cream the butter and sugar together with a hand mixer or in a stand mixer until fluffy. (christymajors.com)
In a large mixing bowl cream butter and sugar (s) at least 5 minutes. (thesweetsensations.com)
In a medium bowl cream butter and sugar, then add eggs one at a time, mix well, then add oil, vanilla and milk and beat till smooth. (anitalianinmykitchen.com)