German Chocolate Brownies

2 (4 ounce) packages sweet baking chocolate
1/2 cup butter or margarine
1 1/2 cups all-purpose flour
1 cup sugar
1/2 teaspoon baking powder
1/2 teaspoon vanilla
1/4 teaspoon salt
2 eggs Coconut-Pecan Frosting (recipe follows)
Coconut-Pecan Frosting
1/2 cup sugar
1/4 cup butter or margarine
1/3 cup evaporated milk
1/2 teaspoon vanilla
2 egg yolks
1 cup flaked coconut
2/3 cup chopped pecans
Heat oven to 350. Grease rectangular pan, 13 9 2 inches. Melt chocolate and butter in 3-quart saucepan over low heat, stirring frequently, until smooth; remove from heat.
Stir in remaining ingredients except
Coconut-Pecan Frosting.
Spread batter in pan. Bake 20 to 25 minutes or until toothpick inserted in center comes out clean. Cool completely. Frost with Coconut-Pecan Frosting. Cut into 8 rows by 4 rows.
Coconut-Pecan Frosting:
Cook sugar, butter, milk, vanilla and egg yolks in 1 1/2-quart saucepan over medium heat about 12 minutes, stirring frequently, until thickened.
Stir in coconut and pecans. Refrigerate about 1 hour or until spreadable.