Neiman Marcus Bars

Bahan-bahan (24 porsi)

• 1 (18,25 ons) paket campuran kue kuning
• 4 large eggs (divided)
• ½ cup mentega tawar yang dicairkan
• 1 (8-ounce) package softened cream cheese
• 4 cups gula bubuk
• 1 teaspoon ekstrak vanila