In large bowl, combine flour, sugar, baking powder, salt, cinnamon, nutmeg, and ginger.
In small bowl, whisk together pumpkin puree, oil, vanilla, and milk.
Stir into flour mixture until just combined and pour into prepared pan.
Top with prepared crumb topping, lightly pressing into cake batter.
Bake in preheated oven for 30-35 minutes, until a toothpick inserted 2" from the edge comes out clean.
Cool in pan and enjoy!!