2.5 cup all-purpose flour, plus 1 teaspoon for blueberries and zest
2 tsp baking powder
1/2 teaspoon salt
1 cup unsalted butter, room temperature
1 cup packed light-brown sugar
1 cup granulated sugar
4 large eggs
1 tsp vanilla extract
1 cup sour cream
2 cup blueberries
2 tblsp grated lemon zest
juice of one lemon
nonstick cooking spray, for pan
1 (4 ounce) tub cream cheese, softened
1 tblsp butter, softened
2 cup icing sugar
1/2 teaspoon vanilla extract
1 tblsp milk
NB: For best results, coat the inside of the Bundt pan with cooking spray just before filling it with the batter to prevent it from pooling in the bottom.
Preheat oven to 350 degrees. In a bowl, whisk 2 1/2 cups flour with baking powder and salt; set aside.
In a mixing bowl, cream butter and sugars on high speed until light and fluffy. Add eggs, one at a time, beating until incorporated. Beat in vanilla and lemon juice. Reduce speed to low; add flour mixture in three additions, alternating with two additions of sour cream.
In a bowl, toss blueberries and zest with remaining teaspoon flour; gently fold into batter. Coat a 12-cup nonstick Bundt pan with cooking spray. Spread batter in prepared pan.
Bake cake on bottom rack of oven until a toothpick inserted into center of cake comes out clean, 60 to 70 minutes. Cool in pan 20 minutes. Invert onto a rack; cool completely, top side up. Dust with confectioners' sugar before serving or drizzle with the cream cheese glaze.
Mix the cream cheese with the butter, icing sugar, vanilla extract, and milk in a bowl.
Heat in a microwave for 10-15 seconds then drizzle spoonfuls over the cooled cake.