Making Peanut Butter Brownie Swirl Cookies is a fun and straightforward process. Follow these steps to create these delicious treats:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
2. Mix Butter and Peanut Butter: In a large bowl, cream together the softened butter and peanut butter until smooth and fluffy.
3. Add Sugars: Gradually add the granulated sugar and brown sugar, mixing until well combined.
4. Incorporate Eggs and Vanilla: Add the eggs, one at a time, followed by the vanilla extract. Mix until fully incorporated.
5. Combine Dry Ingredients: In another bowl, whisk together the flour, cocoa powder, baking soda, and salt.
6. Mix Dry and Wet Ingredients: Gradually add the dry ingredient mixture to the wet ingredients, stirring until just combined.
7. Add Chocolate Chips and Peanuts: If desired, fold in chocolate chips and chopped peanuts to the dough.
8. Scoop the Dough: Use a cookie scoop or tablespoon to drop rounded balls of dough onto the prepared baking sheet, spacing them about 2 inches apart.
9. Bake: Bake in the preheated oven for 10-12 minutes or until the edges are set but the centers are still slightly soft.
10. Cool: Remove from the oven and allow the cookies to cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.

These steps will guide you in creating these incredible cookies with ease and precision.