1. Preheat the oven to 350°F on Bake Mode with a rack set on position 3.
2. In a medium sized bowl mix the streusel ingredients together by hand until well combined and crumbly and set aside.
3. In another medium sized bowl whisk together the wet ingredients until well combined.
4. In a large bowl, whisk together the dry ingredients.
5. Pour the wet ingredients into the dry and fold together gently just until evenly mixed.
6. Spread half of the batter into a sprayed or a greased 9-inch round pan.
7. Add half of the streusel, and then cover with the rest of the batter.
8. Top with the remaining streusel.
9. Place in oven and bake for 25–30 minutes or until a toothpick comes out clean.