Ingredients:
- Butter: 2/3 cup (melted and slightly cooled).
- Sugar: 1 box (1 lb) Light Brown Sugar (roughly 2 1/4 cups).
- Eggs: 3 large eggs.
- Flour: 2 1/2 cups all-purpose flour.
- Leavening: 2 1/2 teaspoons baking powder and 1/2 teaspoon salt.
- Flavor: 1 teaspoon vanilla extract.
- Mix-ins: 1 to 2 cups chocolate chips (and 1 cup chopped walnuts or pecans if you like the “Grandma” style).
Instructions:
- Prep: Preheat your oven to 175°C (350°F). Grease a 9×13 inch baking pan or line it with parchment paper.
- Combine: In a large bowl, stir the melted butter and brown sugar together until smooth.
- Mix: Add the eggs one at a time, beating well after each. Stir in the vanilla.
- Dry Ingredients: Sift in the flour, baking powder, and salt. Stir until just combined (don’t overmix!).
- Fold: Stir in the chocolate chips and nuts.
- Bake: Spread the thick batter into the pan. Bake for 25–30 minutes.
- Tip: Do not overbake! They should look set on the edges but still slightly soft in the middle to stay chewy.
- Cool: Let them cool completely in the pan before cutting into squares.
