Grease and flour a 9x5x3- or 8x4x2-inch loaf pan; set aside. In a medium bowl, stir together the flour, baking powder, and salt; set aside.

In a large mixing bowl, beat butter with electric mixer on medium to high speed for 30 seconds. Add sugar and vanilla; beat until fluffy. Add eggs, one at a time, beating well after each addition.

Add flour mixture and milk alternately to butter mixture, beating on low speed after each addition until just combined. Spread 3/4 of the batter in prepared pan. Sprinkle with chocolate pieces. Spread remaining batter on top.

Bake the cake in a 325 degree F oven for 55 to 60 minutes for the 9x5x3-inch loaf or 65 to 75 minutes for the 8x4x2-inch loaf or until a toothpick inserted near the center comes out clean. Cool in pan for 15 minutes. Loosen the edges of the cake. Remove from pan and cool completely on wire rack.

Prepare Chocolate Frosting. Drizzle over cake. Makes 12 to 16 servings.

In a medium microwavable bowl, combine 1 tablespoon unsalted butter or regular butter and 1/2 ounce unsweetened chocolate, cut up. Microcook on 100 percent power (high) for 45 to 60 seconds or until the chocolate is softened. (Or heat chocolate in a saucepan over low heat.) Stir until smooth; cool to room temperature. Stir in 1/2 teaspoon vanilla and dash salt. With electric mixer on low speed, beat in 3/4 cup sifted powdered sugar and 1 to 2 tablespoons milk; beat on high speed until desired consistency. Spread over top of cake.