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Heat oven to 350°F. Spray 8x4-inch loaf pan with cooking spray; lightly flour.
In large bowl, break up cookie dough. Add sour cream, egg and lemon zest. (DO NOT EAT RAW COOKIE DOUGH AFTER COMBINING WITH EGG.) Beat with electric mixer on medium-low speed 2 to 3 minutes or until smooth. Fold in blueberries. Spoon mixture evenly into pan.
Bake 40 to 50 minutes or until golden brown and toothpick inserted in center comes out clean. Cool 5 minutes. Run knife around sides of pan to loosen cake. Remove cake from pan; place on cooling rack.
In small bowl, mix powdered sugar and 1 tablespoon of the lemon juice; continue adding lemon juice, 1 teaspoon at a time, until desired drizzling consistency. Spoon glaze over hot cake. Cool 45 minutes before serving.