Making Double Chocolate Cookies is straightforward and rewarding. Follow these steps to create your delicious batch:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Line baking sheets with parchment paper.

2. Cream Butter and Sugars: In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.

3. Add Eggs and Vanilla: Beat in the eggs one at a time, followed by the vanilla extract, until fully incorporated.

4. Mix Dry Ingredients: In a separate bowl, sift together the flour, cocoa powder, baking soda, and salt.

5. Combine Mixtures: Gradually add the dry mixture to the wet mixture, stirring just until combined. Avoid overmixing.

6. Fold in Chocolate Chips: Gently fold in the semi-sweet chocolate chips and white chocolate chips if using, ensuring they’re evenly distributed.

7. Scoop the Dough: Use a cookie scoop or tablespoon to drop rounded balls of dough onto the prepared baking sheets, leaving enough space between each cookie.

8. Bake: Place in the oven and bake for 10-12 minutes. The edges should be set, and the centers may appear slightly underdone.

9. Cool on a Rack: Remove from oven and let cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.

By following these instructions, you’ll achieve amazing cookies that are the embodiment of chocolate perfection.