Ingredients
- 1 large sweet potato
- 5 large egg whites
- 1 cup softened unsalted butter, divided
- 1 cup sugar
- 1 1/2 cup chopped pecans, divided
- 1/2 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- 2 teaspoons vanilla extract, divided
- 1 cup brown sugar
- 1/4 teaspoon salt
- 1/2 cup evaporated milk
- 1/2 cup confectioners’ sugar
