Thick bakery-style chocolate chip cookies with crisp edges, soft centers, and a blend of two chocolates.
3 cups all-purpose flour
1 tsp cornstarch
1 tsp baking powder
½ tsp baking soda
¾ tsp salt
1 cup cold unsalted butter, cubed
¾ cup brown sugar
½ cup granulated sugar
2 large eggs
1½ cups semi-sweet chocolate chips
1½ cups dark chocolate chunks
Whisk flour, cornstarch, baking powder, baking soda, and salt.
Mix cold butter with sugars until crumbly.
Add eggs, mixing just until combined.
Stir in dry ingredients until just blended.
Fold in chocolate chips and chunks.
Shape dough into tall mounds and chill 30 minutes.
Bake at 400°F (205°C) until edges are set and tops lightly golden.
Cool briefly before serving.
Dough portions can be frozen. Reheat baked cookies briefly for softer centers.