1-Preheat oven and prepare pan: Begin by preheating the oven to 350°F and spraying a standard half sheet pan (13×18 inches) with nonstick spray to ensure your brownies release easily.

2-Melt chocolate mixture: In a microwave-safe bowl, melt the butter, chocolate chips, and oil in 30-second increments until smooth, then let it cool slightly this step is crucial for that fudgy texture.

3-Beat eggs and sugar: Next, in a stand mixer, beat the cold eggs, sugar, vanilla extract, espresso powder (if you’re using it), and salt on medium-high speed for 6-8 minutes until the mixture is thick, pale, and ribbony; this creates that amazing crackly top.

4-Fold in ingredients and bake: Gently fold in the melted chocolate mixture, then sift and fold in the flour and cocoa powder until just combined to keep the brownies tender. If desired, add extra chocolate chips for more gooey bits. Pour the batter into the prepared sheet pan and spread it evenly with a spatula. Bake for about 25 minutes, or until a toothpick comes out with moist crumbs don’t overbake to avoid dryness. Once done, let the brownies cool completely to room temperature before slicing; chilling them first helps with clean cuts, and you can use a sharp knife dipped in hot water for neat squares. For a fudgier result, serve at room temperature or chilled, and remember to adjust for dietary swaps like vegan options as mentioned earlier.