Copycat Costco Double Chocolate Chip Muffins

The Costco Muffin Everyone Secretly Craves

If you've ever pushed a cart past the Costco bakery case and caught sight of those enormous, glossy, chocolate-studded muffin domes, you know exactly why we're here. These copycat Costco double chocolate chip muffins are rich, fudgy, unapologetically oversized, and loaded with pools of melted chocolate in every single bite. This is the same bakery magic people search for when they type in Costco bakery chocolate chip muffins recipe or Costco style double chocolate chip muffins, and today you get to make it in your own kitchen.

Think of this as the deep, cocoa-forward cousin of those Sally chocolate muffins recipes you may have tried before, but built specifically to mimic that jumbo Costco bakery muffins recipe texture: a crackly, sugary top, a soft steamy interior, and chocolate chips that stay gooey even after the muffins cool.

Before we get cooking, the right tools and ingredients make a real difference here. A sturdy jumbo muffin tin is what gives you that iconic oversized dome, and good quality cocoa powder and real chocolate chips (not chocolate-flavored coating) are what separate a decent muffin from a bakery-worthy one.

Why This Recipe Tastes Like the Real Thing

The secret to that deep, almost brownie-like chocolate flavor isn't just extra cocoa powder, it's the hot coffee. Coffee doesn't make these taste like coffee at all. Instead, it intensifies the chocolate, the same trick used in a lot of professional bakery recipes, including many versions of Costco bakery style muffins.

Buttermilk is the other quiet hero here. It keeps the crumb tender and slightly tangy, which balances out all that sugar and chocolate so the muffin never tastes flat or overly sweet.

Chef's Tip: Don't skip the high-heat start in the oven. Baking at 425 degrees F for the first five minutes is what forces the batter to rise quickly and create that signature tall, cracked muffin top before the inside fully sets.

Getting That Jumbo Bakery Look

A huge part of nailing a Costco bakery muffin recipe at home is simply using the right pan. Regular muffin tins will give you a smaller, more modest muffin, which is still delicious, but won't have that iconic oversized presence. A jumbo 6-cup tin, filled almost to the top with batter, is what gets you there.

Here are a few small details that make a big difference:

• Grease around the top of the muffin cups too, not just inside them. The batter rises and spreads, and you want those crispy chocolate chip edges to release cleanly.
• Press a few extra chocolate chips onto the tops right before baking for that irresistible bakery-case look.
• Resist opening the oven door during the first 15 minutes of baking so the rise isn't disturbed.

Ready to make it? Here is the full step-by-step recipe:

Copycat Costco Double Chocolate Chip Muffins

These copycat Costco double chocolate chip muffins are giant, bakery-style, and packed with rich cocoa and melty chocolate chips in every bite.

Prep:20 mins

Cook:25 mins

Total:45 mins

Yield:6 servings

Cuisine:American

Yield: 6 servingsCalories: 590Protein: 8g

Carbs: 82gFat: 27gSat. Fat: 15gFiber: 4gSugar: 52gSodium: 410mg

Ingredients

Units

USM

Scale

1x2x3x

• 2 1/2 cups all-purpose flour, spooned and leveled
• 3/4 cup unsweetened cocoa powder, natural or Dutch-process
• 1 tsp baking soda
• 1/2 tsp baking powder
• 3/4 tsp salt
• 1 cup granulated sugar
• 1/2 cup light brown sugar, packed
• 2 large eggs, room temperature
• 1 cup buttermilk, room temperature
• 1/2 cup vegetable oil
• 1/4 cup unsalted butter, melted and slightly cooled
• 2 tsp vanilla extract, pure
• 1/2 cup hot coffee, or hot water, deepens the chocolate flavor
• 2 cups semisweet chocolate chips, divided, plus extra for topping

Instruction

1

Preheat the oven to 425 degrees F (220 degrees C). Grease a jumbo 6-cup muffin tin very well or line with jumbo paper liners, including the tops of the pan around each cup.

2

In a large bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt until no lumps remain.

3

In a separate large bowl, whisk the granulated sugar, brown sugar, and eggs until smooth and slightly lightened, about 1 minute.

4

Whisk in the buttermilk, vegetable oil, melted butter, and vanilla extract until fully combined.

5

Pour the wet ingredients into the dry ingredients and fold gently with a spatula until just a few streaks of flour remain. Do not overmix.

6

Stir in the hot coffee until the batter is smooth and glossy, then fold in 1.5 cups of the chocolate chips.

7

Divide the batter evenly among the 6 jumbo muffin cups, filling each one almost to the top. Sprinkle the remaining chocolate chips over the tops, pressing them in slightly.

8

Bake at 425 degrees F for 5 minutes, then, without opening the oven, lower the temperature to 350 degrees F (175 degrees C) and continue baking for 18 to 20 minutes, until a toothpick inserted in the center comes out with a few moist crumbs.

9

Cool the muffins in the pan for 10 minutes, then transfer to a wire rack to cool slightly before serving warm.

Equipment

• Jumbo 6-cup muffin tin
• Jumbo paper liners
• Large mixing bowls
• Whisk
• Rubber spatula
• Wire cooling rack

Notes

For the tallest, bakery-style muffin tops, make sure your batter fills the cups almost completely and don't skip the high-heat start, it's what creates that signature domed rise. Store cooled muffins in an airtight container at room temperature for up to 3 days, or freeze individually wrapped for up to 3 months.

Pin This RecipePrint Recipe

Serving, Storing, and Make-Ahead Tips

These muffins are best served slightly warm, when the chocolate chips are still soft and a little molten. A few minutes in the microwave brings day-old muffins right back to that fresh-baked state, so don't be afraid to make a big batch ahead of time.

For storage, keep them in an airtight container at room temperature for up to three days. If you want to stock up the way you would after an actual Costco haul, wrap each muffin individually in plastic wrap and freeze for up to three months. Thaw at room temperature or microwave straight from frozen in 30 second bursts.

Variations to Try

• Swap half the chocolate chips for chopped dark chocolate chunks for an even more bakery-style texture.
• Add a teaspoon of espresso powder along with the hot coffee for an extra deep, mocha-like flavor.
• Fold in a handful of white chocolate chips for a triple chocolate version.

However you serve them, these muffins deliver that same oversized, chocolate-loaded satisfaction that keeps people coming back to the Costco bakery case, except now you can make them anytime, still warm, and exactly the way you like them.