Preheat oven to 375 degrees. Grease 18 muffin cups.
Using electric mixer, cream butter and 1 1/4 cup sugar in a large bowl until light and fluffy. Add eggs, one at a time, beating well after each addition.
Sift flour, baking powder and salt into small bowl. Mix dry ingredients into butter mixture alternately with milk. Fold in berries.
Divide batter among prepared cups. Sprinkle remaining sugar over top. Bake until toothpick inserted into center comes out clean, about 30 minutes. Serve warm or at room temperature.