Copycat Costco Double Chocolate Muffins

Why You’ll Love This Recipe

These muffins deliver the same indulgent flavor and texture that makes bakery-style muffins so irresistible. They are soft, fluffy, and deeply chocolatey thanks to the combination of cocoa powder and chocolate chips.

Another reason to love this recipe is the size and texture. Just like the original bakery version, these muffins bake up tall and generous with a moist interior that stays fresh for days.

They are also simple to prepare with common pantry ingredients. In less than an hour, you can have a batch of large, decadent muffins that taste just like the popular bakery favorite.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

2 cups all-purpose flour
3/4 cup unsweetened cocoa powder
1 1/2 cups granulated sugar
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
2 large eggs
1 cup milk
1/2 cup vegetable oil
1 teaspoon vanilla extract
1 cup sour cream or plain yogurt
1 1/2 cups semi-sweet chocolate chips

Optional topping:
1/4 cup chocolate chips for topping

Directions

1. Preheat the oven to 375°F (190°C) and line a muffin tin with paper liners.
2. In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, baking soda, and salt.
3. In another bowl, whisk together the eggs, milk, vegetable oil, vanilla extract, and sour cream until smooth.
4. Pour the wet ingredients into the dry ingredients and mix gently until just combined.
5. Fold in the chocolate chips, being careful not to overmix the batter.
6. Divide the batter evenly among the muffin cups, filling them almost to the top for large bakery-style muffins.
7. Sprinkle additional chocolate chips on top if desired.
8. Bake for 18–22 minutes or until a toothpick inserted into the center comes out with only a few moist crumbs.
9. Allow the muffins to cool in the pan for about 5 minutes before transferring them to a wire rack.
10. Serve warm or at room temperature.

Servings and timing

Servings: 12 large muffins

Prep time: 10 minutes
Cook time: 20 minutes
Total time: 30 minutes

Variations

Triple Chocolate Muffins
Add white chocolate chips or dark chocolate chunks along with the regular chocolate chips.

Espresso Chocolate Muffins
Add 1 teaspoon of instant espresso powder to the batter to enhance the chocolate flavor.

Chocolate Banana Muffins
Mix in one mashed ripe banana for added moisture and sweetness.

Mini Chocolate Muffins
Use a mini muffin pan and reduce the baking time to about 10–12 minutes.

Chocolate Nut Muffins
Add chopped walnuts or pecans for a crunchy texture.

Storage/Reheating

Room Temperature
Store the muffins in an airtight container at room temperature for up to 3 days.

Refrigeration
Keep them in the refrigerator for up to 5 days for longer storage.

Freezing
Wrap the muffins individually and freeze for up to 2 months.

Reheating
Warm muffins in the microwave for about 10–15 seconds or heat them briefly in the oven until soft and warm.

FAQs

Why are bakery-style muffins so tall?

Bakery muffins are often filled nearly to the top of the muffin cup and baked at a slightly higher temperature to help them rise quickly.

Can I use Greek yogurt instead of sour cream?

Yes, Greek yogurt works well and provides a similar texture and moisture.

Can I reduce the sugar?

You can reduce the sugar slightly, but it may affect the texture and sweetness.

What type of cocoa powder works best?

Unsweetened cocoa powder works best for achieving a rich chocolate flavor.

Can I make these muffins gluten-free?

Yes, use a gluten-free all-purpose flour blend designed for baking.

Why should I avoid overmixing the batter?

Overmixing can make the muffins dense and tough instead of soft and fluffy.

Can I use chocolate chunks instead of chips?

Yes, chocolate chunks create pockets of melted chocolate throughout the muffins.

How do I keep muffins moist?

Store them in an airtight container and avoid overbaking.

Can I make smaller muffins?

Yes, simply divide the batter into more muffin cups and adjust the baking time.

Can I add a crumb topping?

Yes, a chocolate crumb topping can add extra texture and flavor.

Conclusion

Copycat Costco Double Chocolate Muffins are a rich and indulgent treat that brings bakery-style flavor right into your home kitchen. With their moist texture, deep chocolate taste, and generous amount of chocolate chips, these muffins are perfect for breakfast, snacks, or dessert. Easy to prepare and incredibly satisfying, they are sure to become a favorite homemade baked good.

Copycat Costco Double Chocolate Muffins

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Copycat Costco Double Chocolate Muffins are rich, moist bakery-style muffins loaded with cocoa and chocolate chips, delivering a soft crumb and intense chocolate flavor in every bite.

• Author: Laura
• Prep Time: 10 minutes
• Cook Time: 20 minutes
• Total Time: 30 minutes
• Yield: 12 large muffins
• Category: Dessert
• Method: Bake
• Cuisine: American
• Diet: Vegetarian

Ingredients

• 2 cups all-purpose flour
• 3/4 cup unsweetened cocoa powder
• 1 1/2 cups granulated sugar
• 2 tsp baking powder
• 1/2 tsp baking soda
• 1/2 tsp salt
• 2 large eggs
• 1 cup milk
• 1/2 cup vegetable oil
• 1 tsp vanilla extract
• 1 cup sour cream or plain yogurt
• 1 1/2 cups semi-sweet chocolate chips
• 1/4 cup chocolate chips for topping (optional)

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Instructions

1. Preheat the oven to 375°F (190°C) and line a muffin tin with paper liners.
2. In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, baking soda, and salt.
3. In another bowl, whisk together the eggs, milk, vegetable oil, vanilla extract, and sour cream until smooth.
4. Pour the wet ingredients into the dry ingredients and mix gently until just combined.
5. Fold in the chocolate chips without overmixing the batter.
6. Divide the batter evenly among the muffin cups, filling them nearly to the top.
7. Sprinkle additional chocolate chips on top if desired.
8. Bake for 18–22 minutes until a toothpick inserted into the center comes out with a few moist crumbs.
9. Cool the muffins in the pan for 5 minutes before transferring them to a wire rack.
10. Serve warm or at room temperature.

Notes

• Do not overmix the batter to keep the muffins soft and tender.
• Greek yogurt can be used instead of sour cream for similar moisture.
• Adding espresso powder enhances the chocolate flavor.
• Store muffins in an airtight container at room temperature for up to 3 days.
• Freeze individually wrapped muffins for up to 2 months.

Nutrition

• Serving Size: 1 muffin
• Calories: 420 kcal
• Sugar: 32 g
• Sodium: 260 mg
• Fat: 21 g
• Saturated Fat: 7 g
• Unsaturated Fat: 12 g
• Trans Fat: 0 g
• Carbohydrates: 55 g
• Fiber: 4 g
• Protein: 6 g
• Cholesterol: 45 mg