Blueberry Crumb Buckle - cooking recipe

Ingredients

Crumb topping
1/2 cup all-purpose flour
1/4 cup packed light brown sugar
1/4 cup sugar
1/4 teaspoon ground cinnamon
1/4 cup butter, cut into small pieces
1/3 cup chopped walnuts
Cake
1 1/3 cups all-purpose flour
3/4 teaspoon baking powder
1/4 teaspoon baking soda
1/4 teaspoon salt
1/3 cup butter, softened
1 cup sugar
1 egg
1 teaspoon vanilla extract
2/3 cup buttermilk
2 cups blueberries, divided

Preparation

Preheat oven to 375\u00b0F Coat a 9-inch square baking pan with cooking spray.
To prepare crumb topping, place flour, brown sugar, sugar and cinnamon in a food processor; pulse to combine. Add butter and process until crumbly. Add walnuts and pulse 3 times or until evenly distributed.
To prepare the cake, sift flour, baking powder, baking soda and salt. Combine butter, sugar, egg and vanilla in a mixing bowl and beat until evenly blended. Turn to low speed; add flour mixture alternately with buttermilk and beat until blended.
Stir in 1 cup berries. Turn into pan and spread evenly. Scatter remaining 1 cup berries over top and sprinkle with crumb topping. Bake 45 minutes or until nicely browned and edges of cake begin to pull away from sides of pan. Cool on wire rack.