Adapted from 
                        Bake Something Great
                    
                
                
            
                
                    
                            - 
                                1     cup
                                unbleached flour
                            
 
                            - 
                                1     cup
                                granulated sugar
                            
 
                            - 
                                3/4 cup
                                cocoa powder, sifted
                            
 
                            - 
                                1     tsp
                                baking powder
                            
 
                            - 
                                1/2 tsp
                                baking soda
                            
 
                            - 
                                1/4 tsp
                                salt
                            
 
                            - 
                                1/4 cup
                                olive oil
                            
 
                            - 
                                2     whole
                                eggs
                            
 
                            - 
                                1     cup
                                bananas, mashed, 2 bananas
                            
 
                            - 
                                5     ozs
                                milk chocolate chips
                            
 
                            - 
                                4     ozs
                                walnuts, chopped
                            
 
                            - 
                                8     ozs
                                milk chocolate frosting
                            
 
                    
                 
                    
             
            
Preheat oven to 350. Prepare a 9"x13" pan with cooking spray; set aside. In a mixing bowl, combine flour, sugar, cocoa powder, baking power, baking soda, and salt. Mix well. Add oil, eggs, bananas, and walnuts. Mix until all is moistened. Spread batter into prepared pan. Bake for 25 minutes, or until toothpick inserted in center comes out clean. Cool. Spread with frosting.