This recipe will give you that classic fudgy, dense center with a thin, crackly top. The secret to a perfect fudge brownie is using a high ratio of fat (butter/chocolate) to flour and not over-mixing once the dry ingredients are added. Ingredients 225 g Unsalted Butter, melted and still hot 15 Vegetable Oil (makes it extra moist) 225 g Granulated Sugar 200 g Light Brown Sugar, packed 4 Large Eggs, at room temperature 1 tbsp Pure Vanilla Extract 125 g All-Purpose Flour 100 g Unsweetened Cocoa Powder (Dutch-process is best for a deep flavor) 1 pinch Salt 170 g Semi-Sweet Chocolate Chips or chopped chocolate chunks Instructions Prep the Oven & Pan: Preheat your oven to 350°F (175°C). Grease an 8x12-inch or 9x9-inch baking pan and line it with parchment paper, leaving an overhang on the sides for easy removal Mix the Base: In a large bowl, whisk together the hot melted butter, oil, and both sugars for about a minute. The heat helps dissolve the sugar, which creates that shiny, crackly top. Add Eggs & Vanilla: Add the eggs and vanilla. Whisk vigorously by hand for about 2 minutes until the mixture is light in color and slightly frothy. Combine Dry Ingredients: Sift the flour, cocoa powder, and salt directly into the wet mixture. Fold Gently: Use a spatula to gently fold the dry ingredients into the wet ones. Stop as soon as you see no more streaks of flour. Do not over-mix, or the brownies will become cake-y instead of fudgy. Add Chocolate: Fold in about 3/4 of the chocolate chips. Bake: Pour the batter into the prepared pan and smooth the top. Sprinkle the remaining chocolate chips on top. Bake for 25–30 minutes. The "Toothpick" Test: For fudgy brownies, a toothpick inserted into the center should come out "dirty" with moist crumbs, but not with liquid batter. Cool: Let the brownies cool completely in the pan before lifting them out and slicing. They will continue to set as they cool. Pro Tips for Success Don't Overbake: Even 2 minutes too long can turn a fudgy brownie into a dry one. If the edges are set and the center doesn't jiggle, they are likely done.