Cream the butter and sugars together until light and fluffy—really let them get cozy.
Add eggs one at a time, mixing well after each, then stir in the vanilla.
In a separate bowl, whisk together flour, cocoa powder, baking soda, salt, and spices.
Slowly add the dry ingredients to the wet ingredients, mixing just until combined.
Fold in the oats, white chocolate chips, and chopped dark chocolate chunks.
Chill the dough for at least 30–60 minutes. This is non-negotiable unless you enjoy cookie pancakes.
Preheat oven to 350°F. Line baking sheets with parchment.
Scoop dough (about 2 tablespoons each) and space cookies generously apart.
Bake for 9–11 minutes, until edges are set but centers still look slightly underbaked.
If needed, immediately swirl an oversized round biscuit cutter around each cookie to tidy them up.
Let cool on the baking sheet for 5 minutes, then transfer to a rack.