Brownies
"Dense, fudgy, and absurdly thick — Costco's bakery brownies are the gold standard of sheet pan brownies. This recipe nails the texture: chewy edges, gooey center, shiny crackly top."
The Game Plan
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Preheat oven to 350°F (175°C). Line a 9x13 baking pan with parchment paper, leaving overhang on the sides.
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Melt butter in a large saucepan over low heat. Remove from heat and stir in 1 cup of chocolate chips until melted and smooth.
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Whisk in sugar, then eggs one at a time, then vanilla.
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Sift in cocoa powder, flour, salt, and espresso powder. Fold until just combined — don't overmix.
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Fold in remaining 1 cup chocolate chips.
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Pour into prepared pan and spread evenly. The batter will be thick.
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Bake 28-32 minutes. A toothpick should come out with moist crumbs (not wet batter, not clean). Err on the side of underdone — they firm up as they cool.
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Let cool completely in the pan before slicing. Use the parchment overhang to lift the whole slab out.
