Chocolate Loaf Cake adapted from The Rumford Complete Cook Book- 1934 . In a small saucepan, add the remainder of the sugar and milk and the chocolate squares. Cook until chocolate is dissolved, stiring occassionally. Add the chocolate mixture to the cake batter and beat together well. Sprinkle the chocolate chips over the top. Nowadays I don't usually (re: ever) buy pre-baked, shelf stable, grocery store cakes. If I could only find the chocolate loaf cake of my youth though (it's exceedingly difficult to locate in the wild) I might make an exception. You can have Chocolate Loaf Cake adapted from The Rumford Complete Cook Book- 1934 using 12 ingredients and 5 steps. Here is how you cook it. Ingredients of Chocolate Loaf Cake adapted from The Rumford Complete Cook Book- 1934 You need 1 cup of sugar. Prepare 1/2 cup of sugar. You need 1/2 cup of Butter. You need 2 of eggs well beaten. You need 1/2 cup of milk. ...