Preheat oven to 400°.
Whisk together first 4 ingredients in a large bowl.
Mix flour and next 3 ingredients in another bowl.
Stir flour mixture into egg mixture just until dry ingredients are moistened.
Toss 1 1/2 cups blueberries in 1 Tbsp. flour; fold into batter.
Pour into a lightly greased 9-inch cake pan.
Sprinkle with sugar, chopped walnuts, and cinnamon.
Bake at 400° for 25 to 30 minutes or until a wooden pick inserted in center comes out clean.
Cool in pan on a wire rack 10 minutes
Remove from pan onto plate to serve, or onto wire rack to cool completely.