Banana Nut Muffin with Crunchy Oat Streusel Toppings

6 ¾ oz all purpose flour

½ cup almond flour

½ cup rolled oats

3 ½ oz brown sugar

½ tsp baking soda

7 tbsp avocado oil

2 tbsp oat milk

1 brown egg

1 ¼ tbsp miso

½ cup walnut

1 tsp vanilla bean

1 tbsp honey

1 tsp baking powder

1 ½ cup banana