Best Birthday Pancake Cake Recipe - How To Make Birthday Pancake Cake

Ingredients

• 1 1/2 c. all-purpose flour
• 1/4 c. powdered sugar
• 2 tsp. baking powder
• 1/2 tsp. kosher salt
• 1 1/4 c. whole milk
• 1 large egg yolk, plus 3 egg whites
• 1/4 c. rainbow sprinkles, plus more for serving
• 4 tbsp. unsalted butter, melted and cooled
• Cooking spray
• 1 c. vanilla frosting
• Whipped cream, for serving