Sift flour, baking powder and salt in a large bowl and set aside.
In another bowl combine butter and brown sugar using a mixer until blended.
Add eggs, one at a time to sugar mixture, mixing on low in between each addition.
Add vanilla and mix well.
Add in the flour mixture and mix until combined, then fold in chips and pecans.
Lightly spray a 9 x 13 inch pan with non-stick cooking spray and spread batter evenly into dish.
Bake for 30 minutes or until top is golden brown.
Do not over bake.
Notes
Only Mix Until Combined: Mix everything together just until incorporated, but don’t overmix. Overmixing will make the congo bars turn out tough.Don’t Overbake! Really, don’t overbake these. They will continue to cook after they come out of the oven, so if you bake them longer in the oven, they will end up being dry and crumbly.Recipe adapted from Bakerella