Blueberry Stack Cake
["1 stick butter or margarine (at room temperature)", "4 eggs", "2/3 c. milk", "1 tsp. vanilla", "1 box Butter Recipe cake mix"]
["In a large bowl, add all ingredients to cake mix.", "Beat until well mixed. Bake in 6 thin layers.", "Ice with filling."]
["butter", "eggs", "milk", "vanilla", "Butter"]