Preheat oven to 180 degrees. Grease an 8 inch pan well and set aside.
Beat the butter, sugar and cookie butter till soft and fluffy.
Add one egg at a time and beat well to incorporate.
Whisk the dry ingredients well in another bowl.
Add half into the mixture and beat till combined.
Add in the milk and the remaining dry ingredients and mix till just combined.
Transfer into the prepared tin and spread the top to flatten.
For the topping, rub the ingredients till it represents bread crumbs. Sprinkle on top of the cake.
Bake for 40-50 minutes till skewer comes out clean. Flip onto a rack and cool completely.