Preheat oven to 350 degrees. Grease a loaf pan and set aside.

In a food processor, add all the streusel ingredients and quickly pulse until coarsely combined. Place in refrigerator until ready to use.

In a mixing bowl add sugar, eggs, and vanilla and mix 3-4 minutes until lightened in color. Reduce speed to low and slowly drizzle in the oil, whisking just until combined. Add the banana mash and whisk until combined. Add remaining ingredients and mix well. Do not over mix.

Add the batter to loaf pan and sprinkle the streusel topping evenly over the top. Bake for 45-50 minutes or until a toothpick inserted in the center comes out with a few crumbs. Remove and allow to cool for 20 minutes. Run a knife around the banana bread and invert onto a wire rack to completely cool. The bread is always better the next day, or serve right away.