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Step 1
Start by heating your oven to 350°F (175°C) and grease a 9-inch baking dish so the brownies don’t stick. In a large bowl, combine the brownie mix with cocoa powder, brown sugar, powdered sugar, cinnamon, cloves, nutmeg, allspice, and ginger—give it a good stir to blend all those spices together.
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Step 2
In another bowl, melt the butter and mix it with the coffee, then let it sit for about 5 minutes to cool down a bit. Once it’s not too hot, add the sour cream and vanilla extract, stirring everything together. Pour this wet mixture into the dry ingredients, then crack in the egg. Stir everything about 25 times with a wooden spoon until the batter looks smooth and combined.
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Step 3
Fold in the chocolate chips gently, stirring a few more times to spread them through the batter. Pour the mixture into your prepared dish and pop it into the oven. Bake for 20 to 30 minutes, or until the edges start to pull away from the pan. Let the brownies cool completely before slicing so they hold together nicely.