Step 1: Preheat the Oven

• Preheat your oven to 350°F (175°C).
• Line baking sheets with parchment paper or silicone baking mats.

Step 2: Cream the Butter and Sugars

• In a large mixing bowl, beat the softened butter, granulated sugar, and brown sugar together until creamy and well combined.

Step 3: Add Eggs and Vanilla

• Add the eggs one at a time, mixing well after each addition.
• Stir in the vanilla extract until fully incorporated.

Step 4: Mix Dry Ingredients

• In a separate bowl, whisk together the flour, cocoa powder, baking soda, and salt.

Step 5: Combine Wet and Dry Mixtures

• Gradually add the dry ingredients to the wet mixture, mixing until just combined. Be careful not to overmix.
• Gently fold in the semi-sweet chocolate chips and white chocolate chips (if using).

Step 6: Scoop the Cookies

• Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart.

Step 7: Bake

• Bake in the preheated oven for 10-12 minutes, or until the edges are set but the centers are still soft. They will continue to firm up as they cool.
• Remove from the oven and let the cookies cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.

Step 8: Serve

• Once cooled, enjoy your delicious Double Chocolate Chip Cookies with a glass of milk or your favorite beverage!