Sweet Potato Cake Recipe | Say Mmm

Ingredients

• 26 tbsp. unsalted butter, plus more for pan
• 3 cups flour, plus more for pan
• 1 3 / 4tsp. kosher salt
• 1 tbsp. baking powder
• 1 1/2 tsp. ground cinnamon
• 1 1/2 tsp. ground ginger
• 3/4 sp. ground cardamom
• 1/2 tsp. baking soda
• 1/4 tsp. ground allspice
• 2 3 / 4cups packed light brown sugar
• 4 eggs
• 2 cups mashed roasted sweet potatoes
• 3/4 cup sour cream
• 2 1/2 tsp. vanilla extract
• 8 oz. whole pecans
• 1 1/4 cup sugar
• 1/4 cup dark rum
• 2 egg whites
• 1 cup confectioners' sugar
• 1/4 cup milk