Melt butter in 9 x 13 inch baking dish; then mix flour and sugar with butter in ... sure it is mixed together well. Bake at 350 ... butter. Don't cover tightly.
Mix butter, sugar, egg and vanilla thoroughly. Blend in flour. Divide dough into 3 ... part mix in pre-melted chocolate. In second part ... lightly touched with finger.
Preheat oven to 350 degrees. Grease and flour 9"x13" pan. Beat together sugar ... to egg mixture; mix well. Add oil and vanilla ... and drizzle on cake.