Step 1

Preheat the oven to 350 f/ 170c degrees.

Step 2

Grease and flour an 9 x 13 baking pan.

Step 3

Mix the flour, salt, baking soda, and baking powder together into a large mixing bowl.

Step 4

In a seperate large mixing bowl. beat the butter, brown sugar and granulated sugar in until fluffy.

Step 5

Mix in the eggs one at a time, then add the vanilla.

Step 6

Mix in the flour mixture by hand until combined (this avoids a cake-like consistency).

Step 7

Fold in the chocolate chips.

Step 8

Spread the batter into the prepared pan and smooth the top. Bake for 25 minutes. After 25 minutes, give the pan a little shake. If it jiggles in the middle, put the pan back in and try again every 5 minutes until there is no longer a giggle.