Preheat the oven to 350°F. Grease and line an 8" round cake pan with parchment
In a small bowl, whisk together the flour, baking powder, spices and salt. Set aside.
In the bowl of a stand mixer fitted with a paddle attachment or with an electric mixer, beat the sugar and butter on medium speed together until smooth. Add in the egg and vanilla, mix until combined.
With the mixer running on low, add in half of the milk. Mix in all of the flour mixture followed by the remaining milk. Mix until smooth, scraping the bowl after each addition. Fold in the blueberries. The batter will be thick.
Spread the cake batter into the prepared pan. Sprinkle on the crumble topping.
Bake for 40-45 minutes or until a toothpick or pairing knife inserted into the center comes out clean. You can also check for doneness with an instant read thermometer (200℉).
Let cool for 15 minutes before digging in.