If you have a serious sweet tooth and are craving something rich, moist, and utterly indulgent, let me introduce you to the magical world of the Costco Double Chocolate Muffins Recipe. These muffins are a chocolate lover’s dream come true, combining luscious devil’s food cake mix, fudgy chocolate pudding, and two generous amounts of semisweet chocolate chips for a perfect balance of gooey and cakey textures. Whether you’re whipping them up for a weekend brunch, an after-school treat, or just because chocolate makes everything better, these muffins promise a decadent experience in every bite.

Ingredients You’ll Need

The image shows two glass mixing bowls on a white marbled surface. In the left bowl, there are four egg yolks surrounded by a pale yellow liquid, with bubbles on the surface. A small white dish with a yellow powder and a beige bag of flour are placed nearby on the top right of the left bowl, and a small white bowl of chocolate chips is below it. In the right bowl, a mound of light brown flour or cocoa powder sits on top of the yellow liquid mixture, being stirred with a wooden whisk. The small white bowl of chocolate chips remains in the same position below the bowl. photo taken with an iphone --ar 4:5 --v 7

The beauty of this recipe lies in how simple yet thoughtfully chosen the ingredients are. Each one plays an important role, either enhancing the moist crumb, boosting the chocolate flavor, or adding a little lift and spice to keep your taste buds dancing.

3 large eggs: Provide structure and richness to your muffins, helping everything bind beautifully.
1/2 cup oil: Keeps the muffins incredibly moist and tender without weighing them down.
1/2 cup milk: Adds just the right amount of liquid to create a creamy batter consistency.
1/4 cup water: Balances out the liquids and contributes to a lighter texture.
1 teaspoon vanilla extract: Brings warmth and depth to all that chocolate goodness.
1 cup sour cream (or plain Greek yogurt): Provides tang and moisture, making these muffins deliciously tender inside.
1 box Devil’s food cake mix: Your main chocolate base, bringing a rich, velvety flavor.
3.9 ounce box instant chocolate fudge pudding: Infuses the batter with an extra punch of moistness and fudge-like taste.
1/2 teaspoon cinnamon: Adds an unexpected hint of warmth and complexity to the chocolate.
2 1/2 cups semisweet chocolate chips (divided use): Ensures pockets of melty, gooey chocolate throughout and on top for eye-catching appeal.

How to Make Costco Double Chocolate Muffins Recipe

Step 1: Get Your Oven and Pans Ready

First things first, preheat your oven to 375 degrees Fahrenheit. This temperature is just right to get the muffins perfectly risen and baked through without drying out. Then, line two jumbo muffin tins with liners or generously spray them with nonstick cooking spray. Since most jumbo tins only have six wells, prepare to bake in two batches to make a full dozen.

Step 2: Mix the Wet Ingredients

In a large bowl, beat together the eggs, oil, milk, water, and vanilla extract using an electric or stand mixer. This combination builds the flavorful, creamy base for your perfectly moist muffins that will melt in your mouth.

Step 3: Add the Sour Cream

Stir in the sour cream (or Greek yogurt) next. The tanginess here creates a subtle contrast to the sweet chocolate, elevating the overall flavor and ensuring the texture stays tender rather than cakey.

Step 4: Blend in the Dry Mixes

Now for the chocolate powerhouse ingredients: add in the box of Devil’s food cake mix, instant chocolate fudge pudding, and cinnamon. Use a low speed at first while mixing so the dry ingredients don’t fly out of the bowl. This blend is the secret behind the rich, fudgy texture and intense chocolate flavor that makes this version stand out.

Step 5: Fold in Most of the Chocolate Chips

Fold in 2 cups of the semisweet chocolate chips to distribute gooey bits throughout the batter. These little bursts of chocolate will melt into irresistible pockets as your muffins bake.

Step 6: Fill Your Muffin Tin

Scoop the batter into your prepared tins, filling each about three-quarters full. Using a spring-loaded cookie scoop works wonders for portion control and keeping things neat. Don’t forget to top each mound with the remaining half cup of chocolate chips for an extra glossy, chocolatey finish on top!

Step 7: Bake to Perfection

Bake your muffins on the middle rack of the oven for roughly 20-25 minutes. Keep a close eye toward the end and test with a toothpick—once it comes out clean or with just a few moist crumbs, you’ve hit muffin gold. Baking times may vary by oven, so trust your senses.

How to Serve Costco Double Chocolate Muffins Recipe

The image shows a close-up of a stack of rich chocolate muffins with a white marbled texture background. The top muffin is broken in half, revealing its moist, dark chocolate inside with melted chocolate running down the middle. The muffins have a slightly cracked top surface with shiny chocolate chips scattered on them, giving a soft and dense texture look. The muffins sit close together, showing their dark brown color and fluffy texture, highlighted by soft lighting that enhances the deep chocolate tones. photo taken with an iphone --ar 4:5 --v 7

Garnishes

These muffins are showstoppers all on their own, but if you want to add a little flair, sprinkle a pinch of powdered sugar or cocoa powder right before serving. If you’re feeling extra indulgent, a light spread of softened butter or cream cheese adds a creamy counterbalance to the rich chocolate.

Side Dishes

Pair your muffins with a simple cup of freshly brewed coffee, a cold glass of milk, or even a spoonful of vanilla ice cream for an unforgettable dessert treat. Fresh berries or a fruit salad also add a refreshing pop that cuts through the richness beautifully.

Creative Ways to Present

Turn these muffins into a charming dessert centerpiece by stacking them in a tiered tray for brunch or gifting a few in a cute box tied with a ribbon. You can also slice them open and add a scoop of ice cream and drizzle of chocolate syrup for a decadent, cake-like experience.

Make Ahead and Storage

Storing Leftovers

Keep any leftover muffins in an airtight container at room temperature for up to three days to preserve their moistness and flavor. If your kitchen is warm, storing them in the fridge can extend their life by a day or two but allow them to come back to room temperature before enjoying.

Freezing

These muffins freeze beautifully! Wrap each muffin individually in plastic wrap and place them in a freezer bag or container. They’ll keep for up to three months, making them a perfect make-ahead treat for busy days.

Reheating

To bring frozen or chilled muffins back to life, microwave for about 20 seconds or warm them in a 325-degree oven for 10 minutes. This warm-up restores their soft texture and gooey chocolate charm.

FAQs

Can I substitute the sour cream with something else?

Absolutely! Plain Greek yogurt is a fantastic substitute that offers similar tang and moisture. You can also try buttermilk, but it might make the batter slightly thinner.

Why use a box cake mix instead of making the batter from scratch?

Using a box cake mix simplifies the process tremendously while ensuring consistent chocolate flavor and texture. Plus, paired with instant pudding, it creates an ultra-moist, fudgy muffin that’s hard to beat.

Can I use dark chocolate chips instead of semisweet?

Yes, dark chocolate chips make a great alternative if you prefer a slightly less sweet, more intense chocolate flavor. You could even mix both for added complexity.

How do I know when the muffins are done baking?

Check doneness by inserting a toothpick into the center of a muffin; it should come out clean or with a few moist crumbs. If it’s wet with batter, they need more time.

Is it necessary to use jumbo muffin tins?

Jumbo tins give you the generously sized muffins similar to those from Costco, but you can use standard muffin tins — just reduce baking time by about 5-7 minutes and adjust portions accordingly.

Final Thoughts

There’s something incredibly satisfying about biting into a homemade version of the Costco Double Chocolate Muffins Recipe, knowing exactly how much love and chocolate went into it. Whether you’re treating yourself or impressing friends and family, these muffins never fail to bring smiles and maybe even a little chocolate-fueled joy. So grab your ingredients and get ready to bake your own slice of chocolate heaven!