Preheat your oven to 350 degrees.
Then place parchment paper in the bottom of your baking dish and lightly butter the sides.
In a large bowl, mix all the dry ingredients for the cake together.
In a medium sized bowl, mix together all the wet ingredients for the cake. Slowly add wet ingredients to the dry ingredients and mix well.
Pour into your baking dish and bake for 20 minutes.
While the cake is baking, mix together your streusel topping and set aside. After 20 minutes take the cake out of the oven and crumble the topping evenly over the cake then bake another 8-15 minutes.
Remove from the oven and let cool 30 minutes. If needed, use a fork to spread the topping evenly over cake right after removing from the oven.