I got this recipe from a blog called Coconut & Lime (which is awesome for cookie recipes!)
Ingredients:
2 cups flour
1 3/4 cup light brown sugar
1 cup semisweet chocolate chips*
1/2 cup butter, melted
2 teaspoons baking powder
1 1/2 teaspoons vanilla
2 eggs
Directions:
Preheat oven to 350. Grease and flour a 9x13 inch baking pan. In a large bowl, mix together butter and sugar until thoroughly mixed. Add vanilla and eggs, stir to combine. Add the flour and baking power, mix thoroughly. Use a spatula to evenly distribute the dough into the prepared pan. Bake 20-25 minutes or until a toothpick inserted in the middle comes out clean. Cool completely before slicing. I found it was easier to slice when the whole thing was removed from the pan.
* Mini chips work well here, sometimes the regular chips are difficult to slice.
Its cooking as we speak