Welcome to your new favorite St. Patrick’s Day obsession. These Rich Dark Chocolate Stout Brownies deliver a deep, layered chocolate flavor with a dense, fudgy center and beautifully chewy edges. The stout does not overpower. Instead, it rounds out the cocoa, deepens the dark notes, and gives these brownies a bold, bakery-style finish.
For the best results, use a quality dark cocoa powder and bake in a dependable 10 x 15 inch pan like the Fat Daddio’s POB-1015. Because this batter carries extra moisture from the stout, the brownies may need a slightly longer bake than a traditional brownie recipe. For easy removal, line the pan with parchment paper and leave an overhang on the long sides. That simple parchment sling makes it easy to lift the full slab out cleanly before cutting into rich, sharp-edged bars.
Ingredients for Rich Dark Chocolate Stout Brownies
This recipe yields one 10 x 15 inch pan of brownies. Bring eggs to room temperature before mixing for smoother incorporation.
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1 cup (226 grams) unsalted butter
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1 1/4 cups (106 grams) high-quality dark cocoa powder
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1 cup (240 milliliters) stout beer
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2 cups (400 grams) granulated sugar
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1 cup (220 grams) packed light brown sugar
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4 large eggs, room temperature
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2 teaspoons vanilla extract
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1 3/4 cups (210 grams) all-purpose flour
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1 teaspoon salt
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1 cup (170 grams) dark chocolate chips or chopped dark chocolate
Step-by-Step Baking Instructions
Follow these steps carefully for brownies with a crackled top, chewy edges, and a dense center.
Prepare the Pan and Oven
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Preheat your oven to 325° F (163° C).
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Line your Fat Daddio’s POB-1015 pan with parchment paper, leaving an overhang on the two long sides. Lightly grease any exposed corners or short sides if needed. This sling will help you remove the cooled brownies in one clean lift.
Bloom the Cocoa and Build the Base
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In a medium saucepan over low heat, melt the butter.
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Whisk in the cocoa powder until smooth and glossy.
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Slowly pour in the stout beer and continue whisking until fully combined. The mixture should look dark, silky, and uniform.
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Remove from the heat and let it cool for 5 to 10 minutes so it is warm, not hot.
Mix the Wet Ingredients
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In a large bowl, whisk together the granulated sugar, brown sugar, eggs, and vanilla extract until smooth and slightly thickened.
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Gradually whisk the warm chocolate stout mixture into the egg mixture until fully incorporated.
Add the Dry Ingredients
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In a separate bowl, whisk together the all-purpose flour and salt.
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Fold the dry ingredients into the wet mixture just until no dry streaks remain.
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Fold in the dark chocolate chips or chopped chocolate. Do not overmix. A heavy hand will make the brownies less tender.
Bake for Fudgy Perfection
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Pour the batter into the prepared POB-1015 pan and spread it evenly into the corners.
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Bake at 325° F (163° C) for 28 to 36 minutes.
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Begin checking near the lower end of the range, but expect these brownies may need a few extra minutes because of the added moisture from the stout.
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Test for doneness by inserting a toothpick near the edge of the pan. It should come out with moist crumbs attached, not wet batter. The center should look set but still rich.
Cool and Cut Cleanly
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Let the brownies cool completely in the pan on a wire rack.
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Once fully cooled, use the parchment overhang to lift the entire block out of the pan.
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Cut into squares or bars with a sharp knife, wiping the blade clean between cuts for tidy edges.
These dark chocolate stout brownies bake up bold, dense, and deeply satisfying. They are the kind of dessert that feels a little festive, a little dramatic, and completely worth a second piece.
Looking for more baking inspiration? Browse our collection fatdaddios.com/recipes.