DIY Heart-Shaped Cake | The Fancy Pants Kitchen

Ingredients

• 2 & 3/4 cups (290g) sifted cake flour
• 2 tsp baking powder
• 1/2 tsp baking soda
• 1 tsp salt
• 3/4 cup unsalted butter, room temperature
• 1 & 1/2 cups granulated white sugar
• 2 large eggs + 2 egg whites, room temperature
• 1/2 cup sour cream, room temperature
• 1 tbsp pure vanilla extract
• 1 cup whole milk, room temperature
• Gel food coloring, if desired
• 1 cup unsalted butter, room temperature
• 3 & 1/2 cups powdered sugar, sifted
• 2 tsp vanilla extract
• 2 tbsp whole milk or heavy whipping cream, room temperature
• 1/4 tsp salt, or to taste