Rainbow Cake - RecipesRun

Ingredients

• Colorful food coloring paste or gel
• 1 tbsp. Vanilla extract
• 8 sticks Unsalted butter, at room temperature
• 8 Large egg yolks, at room temperature
• Pinch of fine sea salt
• 1/4 cup Cornstarch
• 1 1/2 cups Granulated sugar
• 2 cups Whole milk
• 1/2 cup Unsalted butter, at room temperature
• 3/4 cup Vegetable oil
• 2 1/2 cups Granulated sugar
• 1 1/4 cups Whole milk, at room temperature
• 8 Large egg whites, at room temperature
• 1 tsp. Fine sea salt
• 1 tbsp. Baking powder
• 3 2/3 cups All-purpose flour, plus more for dusting the pans
• Nonstick cooking spray