Apple banana coffee cake with chocolate chip streusel

Ingredients

• 100 gm all purpose flour
• 1/3 tsp baking powder
• 1/3 tsp baking soda
• 60 gm butter
• 50 gm brown sugar
• 1 egg
• 150 gm banana
• 1 green apple
• Streusel mixture
• 50 gm brown sugar
• 50 gm walnuts
• ½ tsp cinnamon powder
• 80 gm chocolate chips