Creating Salted Peanut Butter & Double Chocolate Cookie Cups is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a muffin tin to prevent sticking.
2. Cream Butter and Sugars: In a large bowl, beat the softened butter, granulated sugar, and brown sugar together until light and fluffy.
3. Add Eggs and Vanilla: Mix in the eggs one at a time, followed by the vanilla extract, ensuring everything is well combined.
4. Combine Dry Ingredients: In another bowl, whisk together the flour, cocoa powder, baking soda, and salt.
5. Mix Dry and Wet Ingredients: Gradually add the dry ingredients to the wet mixture, mixing until just combined. Be careful not to overmix.
6. Fold in Chocolate Chips: Gently fold in the semi-sweet chocolate chips for an extra chocolatey flavor.
7. Scoop into Muffin Tin: Using a cookie scoop, fill each muffin cup about halfway with the cookie dough.
8. Create a Well: Press your thumb or the back of a spoon into the center of each mound of dough to create a well for the peanut butter.
9. Add Peanut Butter: Spoon a small amount of salted peanut butter into the well of each cookie cup.
10. Top with Dough: Add a small amount of cookie dough on top of the peanut butter to seal it in.
11. Bake: Place the muffin tin in the preheated oven and bake for 10-12 minutes, or until the edges are set.
12. Cool: Remove from the oven and let cool in the tin for 5-10 minutes before transferring them to a wire rack.
13. Sprinkle Sea Salt: While still warm, sprinkle a pinch of sea salt over each cookie cup for that perfect sweet and salty balance.

These steps will guide you in creating the ultimate Salted Peanut Butter & Double Chocolate Cookie Cups that will be the highlight of any gathering.