Step 1

Preheat the oven to 350 degrees fahrenheit. Spray a 9x13 pan with cooking spray and set aside.

Step 2

In a medium bowl, whisk together the flour, baking powder, and salt.

Step 3

In a large bowl stir together the melted butter and brown sugar. Add in the eggs and vanilla and stir until combined.

Step 4

Add the dry ingredients to the wet ingredients and mix until combined. Fold in the chocolate chips and nuts.

Step 5

Add the batter to the prepared pan and bake for 30-35 minutes, no longer. If baked longer the bars will become dry and crumbly.

Step 6

Let cool before cutting and serving.