Fat grams per serving: Approx. Cook Time: :15 Preheat oven to 180ºC . Mix together flour, sugar, cocoa, baking soda and salt. Make well in centre of ingredients. Add milk, banana, butter, lemon juice and vanilla. Beat with fork till well blended, about 2 minutes. Stir in chocolate chips. Pour into greased 23 cm square cake pan. Bake in 180ºC oven for 45-50 minutes or till done. Cool completely. To serve, sprinkle with icing sugar.