Tennis-themed ube cake recipe

Ingredients

• 1 package Dundan Hines Moist Deluxed Yellow Cake Mix (or your yellow cake mix of choice)
• 1 1/3 cups water
• 3 eggs
• 1/3 cup butter (or vegetable oil as the original recipe calls for)
• 1 cup grated boiled ube
• purple food coloring
• 1 cup solid white vegetable shortening
• 1 teaspoon coconut extract or coconut essence
• 2 tablespoons + 1 teaspoon water
• 1 libra pure cane confectioners sugar (approximately 4 cups)
• 1 tablespoons Wilton Meringue Powder
• a pinch of salt (about 1/8 tsp.)