1-Gather and Prep: First, preheat your oven to 350°F (175°C) and line an 8×8-inch (20×20 cm) square pan with parchment paper. Measure out all ingredients like melted butter, brown sugar, eggs, and chopped Oreo cookies to streamline the process. This step ensures you’re ready to move quickly, which is great for busy parents or students. For adaptations, prepare flax eggs if making a vegan version. Once everything is set, you’re good to go.

2-Mix the Batter: Next, whisk the melted butter and brown sugar together until smooth. Add the eggs one at a time, then stir in the vanilla. If you’re aiming for a lower-calorie option, swap half the butter for applesauce here to keep things lighter without losing flavor. In a separate bowl, combine the flour, baking powder, and salt. Fold this into the wet mixture gently to avoid toughening the batter.

3-Add the Goodies and Bake: Fold in the chopped Oreo cookies and chocolate chips if you’re using them. Spread the batter into your pan and bake for 20 25 minutes, checking early to get that perfect fudgy center. After baking, let it cool fully before slicing. This step helps the bars set, making them easier to serve at parties or as a quick treat.