First Step: Gather all your ingredients and tools to set up your workspace. Measure out 200 grams of all-purpose flour, 100 grams of granulated sugar, 50 grams of unsweetened cocoa powder, 2 large eggs, 240 milliliters of milk, 120 milliliters of vegetable oil, 10 milliliters of vanilla extract, and 5 grams of baking powder, plus 150 grams of crushed chocolate cookies. For vegan options, prepare flax eggs ahead; this ensures everything is ready for easy fudgy dessert with chocolate cookies preparation. Don’t forget to preheat your oven to 180°C while you organize.

Second Step: Grease a 9-inch round pan with a bit of oil or butter to prevent sticking. This simple action makes cleanup easier and helps your Oreo Blondies release perfectly after baking, adapting well if you’re using a gluten-free pan. Now you’re all set for the mixing phase, keeping the process straightforward for busy parents or students.

Third Step: In a large bowl, combine the dry ingredients first by whisking together 200 grams of all-purpose flour, 100 grams of granulated sugar, 50 grams of unsweetened cocoa powder, and 5 grams of baking powder. This creates a smooth base for your fudgy blondies, and if you’re making them gluten-free, use a certified blend here to maintain that texture. Stir well to avoid lumps, which is key for how to make Oreo Blondies successfully.

Fourth Step: Add the wet ingredients to the dry mixture by pouring in 240 milliliters of milk, 120 milliliters of vegetable oil, 10 milliliters of vanilla extract, and the 2 large eggs. Mix thoroughly until the batter is even; for low-calorie versions, swap some oil with applesauce to reduce fat. This step brings out the chocolate cookies flavor, making your easy blondies extra moist and flavorful.

Fifth Step: Add the crushed chocolate cookies into the batter and fold them in gently for that signature Oreo crunch. Pour the mixture into your greased pan and smooth the top for even baking. For variations, you could add nuts here if desired, adapting to dietary needs like vegan options by ensuring all add-ins are plant-based.

Sixth Step: Bake in the preheated oven at 180°C for 30 to 35 minutes, or until a toothpick inserted comes out clean. Keep an eye on it to prevent over-baking, which helps preserve the fudgy center of your chocolate cookies blondies. Once done, remove from the oven and let it cool in the pan for about 10 minutes.

Final Step: After cooling, transfer the Oreo Blondies to a wire rack to cool completely before cutting into squares. Serve them as is or with a scoop of ice cream for extra delight, and feel free to experiment with chocolate cookies toppings for a personal twist on this easy fudgy dessert with chocolate cookies recipe!