Whisk Dry Ingredients: In a bowl, whisk together bread flour, pudding mix, cornstarch, baking soda, and salt.
Cream Butter & Sugars: Beat butter, brown sugar, and granulated sugar for 3–4 minutes until light/fluffy.
Add Eggs & Vanilla: Mix in eggs one at a time, then vanilla. Don’t overmix.
Combine Wet & Dry: Gradually add dry ingredients to wet, mixing just until combined.
Fold in Chocolate: Gently stir in chocolate chunks (reserve ¼ cup for topping).
Chill Dough: Cover and refrigerate for 1 hour (or up to 72 hours).
Bake: Preheat oven to 375°F (190°C). Scoop 3-tbsp dough balls onto parchment-lined sheets. Bake 10–12 minutes until edges are golden.
Add Toppings: Press reserved chocolate chunks onto hot cookies. Cool 15 minutes on the sheet.
Pro Tip: Bang the pan at the 8-minute mark for perfect thickness!