Brown Butter Snack Cake

Ingredients

• 1 tsp baking powder
• 126 g unsalted butter
• 1 tsp vanilla bean paste
• ½ tbsp vanilla extract
• 226 g granulated sugar
• ¼ tsp fine sea salt
• ¼ tsp baking soda
• 2 large egg whites (room temperature)
• 270 g powdered sugar
• 158 g all-purpose flour
• 1 tbsp vanilla bean paste
• 90 g milk (room temperature)
• 45 g heavy cream
• food coloring (optional)
• fine sea salt (to taste)
• 90 g sour cream (room temperature)