Banana Bread with Self Rising Flour

After 35 minutes in the oven it came out still half undone. I mixed 1/2 cup wholemeal flour, 1 cup all purpose flour and 3 tsp baking powder for the self-rising flour. The part that was cooked was nice, but I found 1/2 cup of chocolate chips too much. 2nd try: I used only all purpose flour this time, only 1/4 cup of mini chocolate chips and baked 7-10 min longer. Reeeeally good, my child ate 3 slices.