In a medium bowl, cream together the butter and sugar. Add in the eggs and milk. Add in th flour and baking powder. Once all is combined, carefully fold in the berries. Grease mini loaf pans, muffin pans, or a regular loaf pan. Pour batter evenly into greased pan(s), about 2/3 full. Place pan(s) in preheated oven, 350 degrees, for about 70 minutes if regular loaf, 35 minutes if mini loaves, or 30 minutes if muffins. *Every oven is different, so keep an eye on it Remove from oven once toothpick comes out clean when inserted in center of bread. Allow to cool slightly before removing from pans and serving! ENJOY!