Checkerboard Cake Recipe

Ingredients

• 1 (15.25 ounce) package devil's food cake mix (such as Duncan Hines®)
• 2 cups whole milk, divided
• 0.67 cup salted butter, melted, divided
• 3 large eggs
• 2 teaspoons vanilla extract, divided
• Baking spray with flour
• 1 (15.25 ounce) package white cake mix (such as Duncan Hines®)
• 3 large egg whites
• 0.5 cup salted butter, softened
• 1 (8 ounce) package cream cheese, softened
• 1 (32 ounce) package powdered sugar
• 0.5 cup unsweetened cocoa powder
• 4 tablespoons whole milk, or more as needed
• 2 teaspoons vanilla extract