Blueberry Gooey Butter Cake

Bahan-bahan (8 porsi)

• One 15.25-ounce box yellow cake mix
• 3 large eggs, (divided)
• 1 cup (2 sticks) butter (divided), (melt each stick in a separate bowl)
• One 8-ounce package cream cheese, (at room temperature)
• 1 teaspoon vanilla extract
• 16 ounces powdered sugar
• 1½ to 2 cups fresh blueberries