Buttery Pecan Bliss with Creamy Icing Layers

Ingredients

• 1 cup (226g) unsalted butter
• 3 cups (333g) cake flour
• 1 cup (200g) granulated sugar
• 1 cup (200g) light brown sugar, firmly packed
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon salt
• 1 1/2 cups (354ml) buttermilk, room temperature
• 2 large eggs, room temperature
• 1 1/2 teaspoons vanilla extract
• 1 1/2 cups (160g) pecan halves, very finely chopped
• 1 1/2 cups (340g) unsalted butter, softened
• 6 ounces cream cheese, softened
• 1/3 cup (66g) light brown sugar, firmly packed
• 1/4 teaspoon salt
• 4 1/2 cups (562g) powdered sugar
• 1 tablespoon heavy cream
• 1/3 cup (35g) pecan halves, very finely chopped, optional