Chewy Toffee Bars

I saw Jamie Deen make these delicious (and easy to make) bars on his Food Network show. They tasted even better than they looked. I didn't toast the pecans since I was short on time. The corners that didn't have the toffee or pecans in them had a rich brown sugar taste and were wonderfully chewy.

Ingredients 
Nonstick spray 
1 1/2 sticks (12 tablespoons) unsalted butter 
2 1/4 cups light brown sugar 
2 cups all-purpose flour 
2 teaspoons baking powder 
Pinch salt 
3/4 cup pecans, chopped 
2 large eggs 
2 teaspoons pure vanilla extract 
1 cup toffee pieces 

Instructions
Preheat the oven to 350 degrees F. Adjust the racks to the center of the oven. Spray an 8-by-8-inch baking pan with nonstick spray. 
Melt the butter in a medium saucepan and stir in the brown sugar until melted together. Let cool for 5 minutes. 
While the mixture is cooling, whisk together the flour, baking powder and salt in a medium bowl. 
Toast the pecans in medium skillet over medium heat. Remove to a plate once toasted. 
Stir in the eggs, one at a time, and vanilla extract into the cooled sugar and butter mixture. Add the dry ingredients into the saucepan until combined. Fold in the toffee and chopped pecans; the batter will be very thick. 
Spread the mixture into the prepared pan. Bake until golden brown and a toothpick inserted into the center comes out clean, about 45 minutes. Cool for 15 minutes before slicing into squares. 
Yields 16 servings