Step 1

Preheat oven to 325F, with rack on lower middle position. Grease and flour a 13x9 pan and set aside.

Step 2

In the bowl of stand mixer fitted with paddle attachment, cream butter and sugar until light and fluffy, about 3-4 minutes. Add eggs and vanilla and stir until combined.

Step 3

In a separate bowl, whisk together the flour, baking powder, and salt. Using rubber spatula, fold butter mixture with flour mixture just until incorporated. Fold in chocolate chips.

Step 4

Press dough into prepared pan, using spatula to even out the surface. Bake for 30-35 minutes, or just until top is lightly browned. It should look puffy, soft, and golden. Center will still be soft.

Step 5

Cool bars completely. Cut into squares. Store leftovers in airtight container at room temp.