Western desserts - Banana Chocolate Cake with Toffee Sauce

Recipe Ingredients:

1 - ¾ cup flour½ cup powdered milk1 teaspoon baking powder½ teaspoon baking sodaA pinch of salt100 grams butter¼ cup vegetable oil½ cup brown sugar½ cup white sugar3 eggs1 teaspoon vanilla extract2 bananas1 teaspoon vinegar½ cup chocolate chips

Toffee Sauce:

50 grams butter¾ cup brown sugar1 can of cream