Whisk together dry ingredients, mix together wet ingredients in separate bowls.

Slowly add dry ingredients to wet ingredients and mix well. Be careful to not over mix. Set aside.

In a small bowl, mix together streusel ingredients until a crumbly mixture forms.

Pour muffin batter into greased baking dish or muffin pan with muffin liners. Top with walnut streusel.

Bake at 350°F for 25 minutes or until toothpick inserted comes out clean. Let cool on cooling rack. Enjoy!