Name: Blue Ombre Cake
Prep time: 60 min
Cook time: 30 min
Total time: 210 min
Yield: 20
Ingredients: 3 3/4 cups all-purpose flour; 3/4 teaspoon baking soda; 1/2 teaspoon salt; 2 1/4 cups granulated sugar; 1 cup vegetable oil; 4 large eggs; 2 teaspoons vanilla; 1 1/2 cups buttermilk; food coloring; 4 cups unsalted butter (, cut into pieces, at room temperature); pinch of salt; 10 cups powdered sugar; 2 tablespoons vanilla; 6-8 tablespoons milk; 7 ounces unsweetened shredded coconut (, divided into thirds)