Preheat oven to 325 degrees.

Take an 8-inch square pan and cover in foil and spray with baking spray.

Using an electric mixer, cream brown sugar and egg until it's light and fluffy. Add vanilla extract and melted butter, mix well with electric mixer.

In a separate bowl, mix together with a rubber spatula the flour, baking soda and salt.

Add the dry ingredients to the wet mixture in batches and incorporate with a rubber spatula. Be careful not to over mix your batter.

Stir in pecans and M&Ms, using rubber spatula. Again, do not over mix.

Add batter to the square pan. Spray an angled spatula with baking spray and use it to smooth over the top.

Bake for about 25-28 minutes. The top will be dry and flaky and a toothpick test should come out clean with a few crumbs attached.

Allow to cool for about 10 minutes on a wire rack. Hold using foil sides and remove from square pan. Makes 16-20 blondie squares.