Preheat your oven to 350°F (175°C) and coat a 13x9-inch baking pan with cooking spray.

Mix sugar cookie mix, softened butter, and one egg in a bowl until a smooth dough forms. Press evenly into the baking pan.

Bake the crust for about 20 minutes, until just set but not browned.

In a separate bowl, mix brown sugar, flour, baking powder, salt, vanilla extract, and the remaining egg. Fold in chopped pecans.

Pour the pecan mixture over the baked crust and bake for an additional 15 minutes.

Let the bars cool in the pan for about 2 hours before cutting into squares.

Slice using a sharp knife for clean cuts and serve.