Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Line a large baking sheet with parchment paper to prevent sticking.
Cream the Butters: In a large mixing bowl, use an electric mixer to cream together the softened butter, packed brown sugar, and granulated sugar. Beat on medium speed until the mixture is light and fluffy, about 3-5 minutes.
Incorporate Eggs and Vanilla: Crack the eggs into the bowl one at a time, mixing thoroughly after each addition to ensure they’re well combined. Then, stir in the pure vanilla extract to infuse sweetness.
Combine Dry Ingredients: In a separate bowl, whisk together the all-purpose flour, baking soda, and fine sea salt. Gradually, add the dry mixture to the wet mixture, stirring gently until the flour is just incorporated. Avoid overmixing to keep the cookies tender.
Add the Fun Ingredients: Carefully fold in the rolled oats, semi-sweet chocolate chips, creamy white chocolate chips, crushed peppermint candies, mixed nuts, and dried cranberries. Ensure everything is evenly distributed for that perfect ‘kitchen sink’ texture!
Shape the Cookies: Using a tablespoon or a cookie scoop, drop rounded dollops of dough onto the prepared baking sheet, leaving space (about 2 inches) between each mound to allow for spreading during baking.
Bake to Perfection: Place the baking sheet in the preheated oven and bake for 10-12 minutes. Keep an eye on them; you want the edges to be lightly golden while the center remains soft and slightly underbaked.
Cool and Enjoy: Once baked, remove the cookies from the oven and let them cool on the baking sheet for 5 minutes. Afterward, transfer them to a wire rack to cool completely—this will help them set to the perfect texture.
Notes
Arrange the warm cookies in a festive stack on a decorative plate. For an extra festive touch, sprinkle some additional crushed peppermint candies on top.