1. Preheat oven to 350°F Grease an 8 or 9-inch square baking dish.
2. Cream butter and sugar until light and fluffy. Add eggs one at a time, beating well after each addition. Beat in vanilla.
3. Mix dry ingredients together. Add half of dry mixture to wet ingredients. Add Carnation milk and then remaining dry mixture. Add chopped chocolate.
4. Spoon batter into prepared pan and spread evenly. Bake 45-50 minutes until a toothpick inserted in center comes out clean.