Good-Cooking - Raspberry Chocolate Muffins

Ingredients

• 1/2 pound butter
• 2 cups granulated sugar
• 4 large eggs
• 1 cup buttermilk
• 1/2 cup orange juice
• 4 cups all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 1 teaspoon salt
• 1 (12 ounce) package semisweet chocolate chips
• 6 ounces frozen raspberries or 3/4 cup fresh raspberries