Lightly grease a 25 cm oven-safe skillet with non-stick spray and set aside.
Cut butter into cubes and heat in a heavy saucepan over medium heat, stirring constantly until golden brown and fragrant. Remove from heat and let cool slightly.
Preheat oven to 350°F (175°C).
In a large mixing bowl, whisk the browned butter with brown and granulated sugars until well combined.
Add eggs and vanilla extract, whisking until fully incorporated.
Sift together flour, baking soda, and salt. Fold gently into the wet ingredients until no flour streaks remain.
Stir in semisweet chocolate chips, chocolate discs, chopped Lindt bars, and crushed Oreos until evenly distributed.
Spread half the cookie dough evenly in the prepared skillet, place two whole Lindt Cookies & Cream bars in the center, then cover with remaining dough to enclose the bars.
Sprinkle additional semisweet chocolate chips over the top.
Bake for 25 minutes until edges are golden and center is slightly underdone.
Remove from oven and immediately top with extra chocolate chips and discs. Let cool at least 25 minutes for a gooey center.
Serve warm topped with cookies and cream ice cream.