Copycat Costco Double Chocolate Muffins

These Copycat Costco Double Chocolate Muffins are rich, moist, and loaded with chocolate chips in every bite. Perfect for breakfast, snacks, or a chocolate fix anytime, they’re bakery-style muffins you can make at home.

If you’ve ever bitten into one of Costco’s famous double chocolate muffins and wished you could make them at home, this recipe is your answer.

Rich, moist, and packed with chocolate chips, these muffins capture all the bakery-style goodness you love — without the warehouse trip.

Perfect for breakfast, an afternoon snack, or an indulgent treat any time of day, they’re easy to whip up and guaranteed to satisfy any chocolate craving.

Why You Will Love This Recipe!

• Bakery-Style at Home – Enjoy the same rich, chocolatey muffins without leaving your kitchen.
• Loaded with Chocolate – Every bite is packed with gooey chocolate chips for maximum indulgence.
• Moist and Tender – No dry muffins here; these stay soft and fluffy every time.
• Easy to Make – Simple ingredients and straightforward steps make baking stress-free.
• Perfect for Any Occasion – Breakfast, snack, or dessert — these muffins fit every craving.

Love Muffin Recipes? Some of my favorites are AIR FRYER BERRY CREAM MUFFINS, AIR FRYER TRADER JOE’S BANANA BREAD MUFFINS, AIR FRYER BLUEBERRY MUFFIN MUG CAKE, and AIR FRYER BLUEBERRY MIX MUFFINS.

Costco Double Chocolate Muffins Ingredients

• All-purpose flour – Provides structure and a soft, tender muffin base.
• Granulated sugar – Sweetens the muffins and helps with golden crust.
• Cocoa powder – Adds rich chocolate flavor and deep color naturally.
• Baking powder – Helps muffins rise and stay light and fluffy.
• Baking soda – Works with acids for perfect muffin texture.
• Salt – Enhances flavor and balances sweetness in the batter.
• Eggs – Binds ingredients together and adds moisture and richness.
• Whole milk – Provides moisture and contributes to tender muffin crumb.
• Vegetable oil – Keeps muffins moist and soft after baking.
• Vanilla extract – Adds warmth and depth to the chocolate flavor.
• Semi-sweet chocolate chips – Melts into gooey pockets of chocolate in muffins.

How To Make Copycat Costco Double Chocolate Muffins

Step One: Preheat your oven to 350°F (175°C) and line a 12-cup muffin tin with paper liners or lightly grease it. In a large bowl, whisk together all-purpose flour, granulated sugar, cocoa powder, baking powder, baking soda, and salt until evenly combined.

Step Two: In another bowl, beat together eggs, whole milk, vegetable oil, and vanilla extract until smooth and well blended.

Step Three: Pour the wet ingredients into the dry ingredients and gently fold together using a spatula until just combined. Avoid overmixing to keep muffins tender. Fold in semi-sweet chocolate chips, reserving a few to sprinkle on top for extra gooey pockets.

Step Four: Divide the batter evenly among the muffin cups, filling each about 2/3 full. Top with reserved chocolate chips if desired. Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted in the center comes out clean.

Copycat Costco Double Chocolate Muffins Recipe Tips

• Don’t Overmix – Fold wet and dry ingredients until just combined to keep muffins tender and moist.
• Room Temperature Eggs & Milk – Helps create a smoother batter and better rise.
• Reserve Chocolate Chips for Topping – Adds gooey pockets and a visually appealing finish.
• Check Oven Temperature – Oven temps vary; start checking muffins at 20 minutes to avoid overbaking.
• Optional Add-Ins – Try a handful of chopped nuts or a sprinkle of sea salt on top for extra flavor.

Storing Instructions

• At Room Temperature: Store muffins in an airtight container for up to 3 days.
• In the Refrigerator: Keep in a sealed container for up to 1 week; bring to room temperature before serving.
• Freezing: Wrap each muffin individually in plastic wrap and store in a freezer-safe bag for up to 3 months. Thaw at room temperature or warm in the microwave for 20–30 seconds.

Copycat Costco Double Chocolate Muffins Recipe Faqs

Can I make these muffins dairy-free? Yes! Use a non-dairy milk like almond or oat milk and a plant-based butter or oil substitute.

Can I use dark chocolate instead of semi-sweet chocolate chips? Absolutely! Dark chocolate will give a richer, slightly more bitter flavor, which pairs well with the sweet muffin base.

Can I make mini muffins? Yes, reduce baking time to 12–15 minutes and check with a toothpick to avoid overbaking.

Can I use a stand mixer? You can, but gently fold the ingredients at the end to avoid overmixing.

Why didn’t my muffins rise properly? Check that your baking powder and baking soda are fresh, and don’t overmix the batter. Room-temperature eggs and milk also help the rise.

More Copycat Costco Recipes

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