Start by preheating your oven to 350°F. This ensures that your brownies bake evenly and develop a lovely crust. While the oven warms up, prepare your baking pan for the magic that’s about to happen.
Line a 9x13-inch pan with foil and spray it with cooking spray. This will prevent sticking and make it easier to lift the brookies out once they’re cool. Trust me, this step is vital for easy serving.
Next, mix the brownies according to the package directions or if you’re feeling adventurous, mix all the ingredients for a homemade batch! You want to make sure everything is well combined, creating a smooth batter.
Once mixed, spread the brownie batter evenly in the bottom of your prepared pan. Take your time with this step; an even layer is key to consistent baking.
Now, it’s time to make the cookie layer! In a large bowl, cream the butter and both sugars together until smooth. You can use a stand mixer or a hand mixer for this—just make sure it’s well combined.
Beat in the egg, vanilla, baking soda, and salt until you achieve a smooth mixture. This adds richness to the cookies and contributes to their delightful texture.
Next, mix in the flour until just combined. Be careful not to overmix; this can lead to tough cookies.
Now, stir in the oats and butterscotch chips. The oats will give the cookies that chewy texture while the butterscotch delivers bursts of sweetness.
Drop spoonfuls of the cookie mixture evenly over the top of the brownie batter. Don’t worry about covering it completely; you want pockets of brownie and cookie to shine through.
Press down lightly with your hands to flatten the cookie dough slightly. Be cautious not to mix the two layers too much; they should remain distinct.
Bake for 25-30 minutes or until the cookies are golden brown. The brownies will cook but still be fudgy, so a toothpick test isn’t the best method here.
After baking, let the brookies cool completely in the pan before slicing. This helps them set and makes cutting easier.
Store in an airtight container for up to 3 days or freeze for up to one month. They make for a fantastic treat you can pull out whenever cravings hit!