Brown the Butter: In a light-colored saucepan, melt 1 cup of unsalted butter over medium heat, stirring frequently until it turns golden brown, about 5 to 7 minutes.

Prepare Dry Ingredients: Whisk together 1.75 cups all-purpose flour, 1 tsp baking soda, 0.5 tsp baking powder, 1 tsp cornstarch, and 0.5 tsp salt in a bowl.

Cream Butter and Sugars: Beat the cooled brown butter with 1 cup dark brown sugar and 0.5 cup granulated sugar until fluffy. Add 2 eggs one at a time, then stir in 2 tsp vanilla extract.

Combine Ingredients: Gradually add the dry mixture to the wet mixture until just combined. Fold in 2 cups chocolate chips.

Chill the Dough: Cover the dough with plastic wrap and refrigerate for at least 30 minutes.

Bake: Preheat oven to 350°F (175°C). Scoop dough onto a lined baking sheet and bake for 10 to 12 minutes.