I used a 9 x 13 cake pan that was greased and floured.
1/2 Cup Butter 3/4 Cup Milk
1 Cup Sugar 1/4 Tsp Salt
1 Egg 2 Tsp Baking Powder
2 Squares Chocolate 1 Tsp Vanilla
2 Cup Flour
Mix and cream butter until very light, add sugar gradually. Add egg. Soften chocolate over hot water and add. When mixture is perfectly smooth. Add sifted dry ingredients alternately with milk and vanilla, beating until smooth after each addition. Bake at 350 degrees for 40 to 45 minutes.