Mix Wet Ingredients: In a large mixing bowl, whisk the cooled, melted butter, granulated sugar, brown sugar, vanilla extract, and kosher salt together until smooth and well combined.
Add Dry Ingredients: Sift in the cocoa powder and all-purpose flour, then add the baking soda. Stir with a rubber spatula until almost combined.
Fold in half of the chopped pecans and dark chocolate chunks until no dry streaks remain.
Chill: Cover the bowl tightly with plastic wrap and chill in the refrigerator for at least 1 hour. Chilling prevents the melted butter dough from over-spreading in the oven.
Assemble and Stuff: Use a standard 1.5-tablespoon cookie scoop to measure portions.
Flatten each dough ball in your palm, place a caramel candy in the center, and wrap the dough tightly around it, rolling it into a smooth ball.
Roll each stuffed dough ball in the remaining chopped pecans to coat the exterior.
Bake: Preheat your oven to 180°C (350°F) and line a baking sheet with parchment paper. Place them 2 inches apart on the baking sheet and bake for 10 to 12 minutes, until the edges are set.
Cool and Drizzle: Let the cookies cool on the pan for 5 minutes, then transfer to a wire cooling rack. Once cooled, drizzle with melted dark chocolate and let set before serving.
Notes
Weigh Your Ingredients: For exact accuracy and the softest, most fudgy texture, weigh flour, cocoa powder, and butter in grams using a digital kitchen scale.
Cool the Melted Butter: Allow the melted butter to cool to warm room temperature before whisking in the eggs so it does not scramble the eggs or melt the chocolate chunks prematurely.
Seal the Caramel Completely: Wrap the cookie dough tightly around each caramel candy with no exposed gaps. Any exposed caramel will melt out and leak onto the baking pan during baking.
Toast the Pecans: Toast the chopped pecans in a dry pan over medium heat for 3 to 5 minutes to deepen their natural flavor before rolling the dough balls in them.
Do Not Overbake: Take the cookies out when the edges are set but the centers still look soft. They will finish setting as they cool on the warm baking sheet for 5 minutes.
Do Not Skip Chilling: Chilling the dough for at least 1 hour is essential. It firms up the melted butter so the cookies bake thick rather than spreading too thin.
Bake From Frozen: Stuffed unbaked dough balls can be frozen for up to 3 months. Bake straight from the freezer at 180°C (350°F), adding 1 to 2 minutes to the bake time.