Copycat
Costco Double Chocolate Muffins
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These Copycat Costco Double Chocolate Muffins are oversized bakery-style muffins that are ultra-moist, packed with deep chocolate flavor, and loaded with melty chocolate chips in every bite.
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To make,
whisk together the flour, cocoa powder, baking powder, baking soda, salt, and espresso powder (if using).
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Whisk the slightly cooled melted butter and sugar in a large mixing bowl.
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Add eggs in one at a time, followed by the vanilla extract. Then add the sour cream and buttermilk, whisk.
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Fold in the dry ingredients and 1 ½ cup chocolate chips.
Allow the batter to rest for 10-15 minutes at room temperature.
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Divide the batter into the prepared jumbo muffin pan then top muffins with reserved chocolate chips.
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Bake for 5 min at 425°F, then reduce oven temperature to 350°F (without opening the oven) and bake again for ~19-25 minutes.
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Cool in the muffin pan for a few minutes, then enjoy!
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