Rainbow Birthday Cake Recipe from Scratch - MakeBetterFood.com

Ingredients

• 8 large eggs, room temperature
• 1 cup whole milk, room temperature
• 1 pound (4 sticks) butter
• vegetable shortening
• flour
• parchment or wax paper
• reserved eggs
• reserved milk
• 4 teaspoons vanilla extract
• 3 cups sugar
• 3 ½ cups cake flour
• 4 teaspoons baking powder
• 2 teaspoons salt
• reserved butter
• 1 ½ cups of reversed egg-milk-vanilla mixture
• remaining egg-milk-vanilla-mixture
• 5 drops purple soft gel paste food coloring
• 8 drops blue soft gel paste food coloring
• 6 drops green soft gel paste food coloring
• 4 drops yellow soft gel paste food coloring
• 5 drops orange soft gel paste food coloring
• 8 drops red soft gel paste food coloring
• 30 ounces white frosting
• rainbow sprinkles