Trisha Yearwood's Butterscotch Bars

Ingredients:

1/2 cup granulated sugar

1/2 cup packed light brown sugar

1/2 cup (1 stick) unsalted butter, melted

1 teaspoon vanilla extract

2 large eggs

1 cup all-purpose flour

1 teaspoon baking powder

1/2 teaspoon salt

1/2 cup butterscotch chips

1/2 cup chopped pecans or walnuts (optional)

Instructions: