Leia’s Birthday Chocolate Cake | Scratch Pantry

Ingredients

• 1 cup butter , softened
• 3 cups brown sugar , packed
• 4 large eggs
• 2 teaspoons vanilla extract
• 2 2 ⁄ 3 cups all-purpose flour
• 3 ⁄ 4 cup baking cocoa
• 3 teaspoons baking soda
• 1 ⁄ 2 teaspoon salt
• 1 1 ⁄ 3 cups sour cream
• 1 1 ⁄ 3 cups boiling water
• 1 ⁄ 2 cup butter , cubed
• 3 ounces unsweetened chocolate , chopped
• 3 ounces semisweet chocolate , chopped
• 5 cups powdered sugar
• 1 cup sour cream
• 1 ⁄ 8 teaspoon salt