Alberta's Steamed Chocolate Pudding

This recipe was copied from the Boston Cooking School Cookbook, c1917

3 tablespoons butter
2/3 cup sugar
1 egg
1 cup milk
2 1/4 cups flour
4 1/2 teaspoons baking powder
2 1/2 square Baker's chocolate (unsweetened)
1/4 teaspoon salt

Cream butter, add sugar gradually and egg, well beaten. Mix and sift flour with baking powder and salt, and add alternately with milk to first mixture, then add chocolate melted. turn into a butter mould. Cover and steam two hours. Serve with Cream Sauce.

Cream Sauce

1/4 cup butter
1 cup powdered sugar
1/2 teaspoon vanilla
1/4 cup heavy cream

Cream butter, add sugar gradually, vanilla and cream beaten until stiff.