Preheat oven to 350 degrees F. Line a 13x9-inch baking pan with foil, extending the ends over the sides of the dish.

In large microwave safe bowl, melt butter in microwave (approximately 1 minute).

Add cake mix and one egg. Beat with mixer until well blended.

Press 2/3 of the cake mixture onto bottom of foil lined pan.

With electric mixer, beat cream cheese and sugar until well blended.

Add remaining egg, zest and juice and mix well. Pour over crust.

Top with blueberries.

Pinch small pieces of the remaining cake mix mixture between your fingers. Gently press into cream cheese layer.

Bake for 48 to 50 minutes or until toothpick inserted in center comes out clean. Cool completely.

Use foil edges to lift dessert from pan. Cut into bars. Keep refrigerated.