Funfetti Birthday Cake - Daphne Oz

Ingredients

• 9 tbsp unsalted butter softened
• 3 cups granulated sugar
• 1 cup avocado oil
• 4 tsp vanilla extract
• 2 cups + 2 tbsp all-purpose flour
• 2 cups bread flour
• 4 ½ tsp baking powder
• 1 ½ tsp salt
• 1 ½ cup milk
• 9 egg whites at room temperature
• ½ cup sprinkles – I try to find ones that are naturally colored, like THESE
• 1 lb unsalted butter
• ½ tsp salt
• 6 cups powdered sugar
• 6 tbsp heavy cream
• 2 tsp vanilla extract