SR Sweet Potato Praline Brownies

Sweet Potato Praline Brownies

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
¼  teaspoon of salt
½  cup evaporated milk
1/2   cup confectioners sugar

Instructions: