# What You’ll Need:
→ Dry Ingredients
01 - 1 1/2 cups all-purpose flour
02 - 1/2 teaspoon baking powder
03 - 1/2 teaspoon baking soda
04 - 1/2 teaspoon fine sea salt
→ Wet Ingredients
05 - 1 cup unsalted butter, melted and slightly cooled
06 - 1 1/2 cups packed light brown sugar
07 - 2 large eggs, room temperature
08 - 2 teaspoons vanilla extract
→ Mix-ins
09 - 1 cup semisweet chocolate chips
10 - 3/4 cup chopped toasted walnuts or pecans
# Step-by-Step:
01 - Preheat oven to 350°F. Line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
03 - In a large bowl, whisk the melted butter and brown sugar until smooth and glossy. Add eggs one at a time, whisking well after each addition. Stir in vanilla extract.
04 - Fold the dry ingredients into the wet mixture using a spatula, mixing until just combined.
05 - Gently fold in chocolate chips and nuts.
06 - Spread the batter evenly into the prepared pan. Bake for 22-25 minutes, or until the top is golden and a toothpick inserted in the center comes out with moist crumbs (not wet batter).
07 - Cool completely in the pan before lifting out with the parchment and cutting into bars.