16 tbsp (2 sticks/8 oz/225 gm) unsalted butter,softened
1 1/2 cups sugar
3 large eggs
2 tsp vanilla extract
1 cup cake flour,sifted
1 1/2 cups all purpose flour,sifted
2 tsp baking powder,sifted
3 egg yolks
1/4 cup milk or buttermilk
2 punnet blueberries,picked and patted dry
2 cups all purpose flour
1 tsp baking powder
1/3 cup granulated sugar
1/2 cup firmly packed light brown sugar
1/2 tsp ground cinnamon
1/4 tsp ground nutmeg
12 tbsp(1 1/2 sticks) unsalted butter melted
1:Set a rack in the middle of the oven and preheat to 350°F(180°C).Prepare and buttered baking pan with lined fully parchment paper.
2:For the crumb topping,mix the flour,baking powder,sugars,cinnamon and the nutmeg in a bowl.Stir in the melted butter.Rub the mixture between your fingers to form coarse crumbs.Scatter the crumbs over the berries evenly as possible.Set aside.
4:Stir together the flour and baking powder and add the dry mixture to the batter in 3 additions,alternating with the yolks and milk,beginning and ending with the flour.Spread the batter evenly in the prepared pan.