Buttermilk Chocolate Bread

1/2 cup butter (112.5 gr)
1 cup white sugar (200 gr)
2 eggs
1 cup buttermilk
1 3/4 cups all-purpose flour (218.75 gr)
1/2 cup unsweetened cocoa powder (45 gr)
1/2 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1 cup chocolate chips