Blueberry-Lemon Bundt Cake 1-1/2 c. fresh blueberries 2 Tbsp. flour 1 lemon cake mix 1 c. sour cream 4 large eggs Grease and flour Bundt pan. Sprinkle flour over blueberries. Combine dry cake mix and dour cream. Add eggs, one at a time, beating at low speed. Beat at medium speed until smooth. Bake at 350 degrees for 45 minutes. Cool on rock for 15 minutes. Remove from pan.