Name: Costco Double Chocolate Muffins Recipe
Prep time: 10 min
Cook time: 25 min
Total time: 35 min
Cuisine: American
Ingredients: 3 eggs; 1/2 cup oil; 1/2 cup milk; 1/4 cup water; 1 teaspoon vanilla; 1 cup plain Greek yogurt; 1 (15.25 ounce) Devil’s food cake mix; 1 (3.9 ounce) package instant chocolate fudge pudding mix; 1/2 teaspoon cinnamon; 2 1/2 cups semisweet chocolate chips, divided

Print Recipe· 4.2 from 7 reviews

If you have a serious sweet tooth and love chocolate in all its glory, the Costco Double Chocolate Muffins Recipe is the perfect treat to add to your baking repertoire. These muffins are incredibly moist and richly chocolatey, combining the intense flavor of Devil’s food cake mix with the silky texture from chocolate fudge pudding and the gooey goodness of semisweet chocolate chips. They bake up beautifully every time, making them an ideal choice whether you’re entertaining guests or simply craving a decadent homemade chocolate fix.

Ingredients You’ll Need

The image shows various ingredients placed on a white marbled surface. There are three white eggs positioned together near the center left. To their right, a sealed plastic bag holds a light brown powdery substance, likely cocoa powder. Surrounding these are small white bowls containing different ingredients: bright yellow oil in a white bowl at the bottom center, dark chocolate chips in a white bowl at bottom right, a creamy white liquid in a white bowl to the right, and thick white yogurt in a white bowl at bottom left. A small white plate near the top left holds a heap of orange spice, and another white plate directly above it contains a small pool of amber-colored liquid. A small clear glass bowl with a bit of clear liquid is near the bottom left. All items are neatly arranged, showing their distinct colors and textures clearly, on a clean white marbled background. Photo taken with an iphone --ar 4:5 --v 7

The beauty of the Costco Double Chocolate Muffins Recipe is how it comes together with just a handful of simple, everyday ingredients. Each one plays a key role in transforming basic pantry staples into luscious, chocolate-filled muffins that are sure to impress.

3 eggs: These provide structure and richness, helping the muffins rise beautifully while keeping them tender.
1/2 cup oil: Adds moistness and keeps the muffins soft for days.
1/2 cup milk: Balances the liquid content and helps blend all the flavors harmoniously.
1/4 cup water: Lightens the batter slightly without compromising richness.
1 teaspoon vanilla: Enhances the chocolate notes with a warm, inviting aroma.
1 cup plain Greek yogurt: Adds a subtle tang and extra moisture, making these muffins wonderfully fluffy.
1 15.25 ounce Devil’s food cake mix: The chocolate cake mix is the base that delivers deep cocoa flavor and a tender crumb.
1 3.9 ounce package instant chocolate fudge pudding: Gives an irresistible fudgy texture and intensifies the chocolatey goodness.
1/2 teaspoon cinnamon: A hint of warmth that perfectly complements the chocolate.
2 1/2 cups semisweet chocolate chips, divided: These are the crowning glory, providing melty pockets of chocolate in every bite, with some sprinkled on top for that beautiful finishing touch.

How to Make Costco Double Chocolate Muffins Recipe

Step 1: Preheat and Prep

Begin by preheating your oven to 375 degrees Fahrenheit. Line a jumbo muffin tin with jumbo liners to ensure your muffins bake evenly and don’t stick to the pan. This prep step sets the stage for muffin success every time.

Step 2: Mix Wet Ingredients

In a large bowl, whisk together the eggs, oil, milk, water, and vanilla extract using an electric mixer. This combination forms the moist, luscious base that will give your muffins a tender crumb and encourage even rising.

Step 3: Add Greek Yogurt

Next, whip in the Greek yogurt. It might seem unusual in muffins, but it’s a game-changer, adding moisture and a slight tanginess that balances the rich chocolate beautifully without making the batter too dense.

Step 4: Combine Dry Ingredients

Using a spoon, gently fold in the Devil’s food cake mix, instant chocolate fudge pudding, and cinnamon. This mixture is the heart of the chocolate flavor and builds the structure your muffins need while keeping them tender and moist.

Step 5: Stir in Chocolate Chips

Gently stir in 2 cups of chocolate chips—this is where the “double chocolate” magic really happens. Distributing the chips throughout ensures every bite has lovely bursts of melty chocolate.

Step 6: Fill Muffin Liners and Top

Divide the batter evenly among the lined muffin cups. Then sprinkle the remaining half cup of chocolate chips on top to give the muffins a gorgeous, inviting appearance and an extra boost of chocolate flavor right where you want it most.

Step 7: Bake to Perfection

Bake the muffins for 20 to 25 minutes, or until a toothpick inserted into the center comes out clean. This baking time ensures they are fluffy inside with a slight crisp on the edges for that perfect muffin texture.

How to Serve Costco Double Chocolate Muffins Recipe

A dark gray metal muffin tray holds six white paper liners filled with thick, rich chocolate batter. Each liner is filled almost to the top with the dense, glossy batter that has a slightly rough texture, showing swirls and uneven peaks. Scattered on each mound of batter are flat, light brown chocolate chips that add a bit of texture contrast. The muffin tray rests on a clean white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Garnishes

While these muffins are heavenly on their own, garnishing with a light dusting of powdered sugar or a drizzle of chocolate ganache can elevate them for special occasions. Fresh berries scattered alongside also add a pop of color and a refreshing contrast to the rich chocolate.

Side Dishes

Serve these muffins alongside a warm cup of coffee or a glass of cold milk for the ultimate comfort snack. For brunch, pair them with scrambled eggs or a fresh fruit salad to balance the richness with a bit of brightness.

Creative Ways to Present

Want to wow your guests? Arrange Costco Double Chocolate Muffins Recipe on a decorative platter lined with parchment paper, then sprinkle extra chocolate chips or cocoa nibs around for extra flair. You could even slice them in half and add a dollop of whipped cream or cream cheese frosting between halves for a muffin sandwich that will have everyone talking.

Make Ahead and Storage

Storing Leftovers

Once cooled, store any leftover muffins in an airtight container at room temperature for up to three days. Keeping them sealed helps retain their softness and prevents the chocolate chips from drying out.

Freezing

If you want to save your Costco Double Chocolate Muffins Recipe for later, simply wrap each muffin individually in plastic wrap and place them in a freezer-safe bag. They freeze beautifully for up to three months, so you can enjoy rich chocolate muffins on-demand whenever the craving hits.

Reheating

To reheat, unwrap a muffin and warm it in the microwave for about 20 seconds or until heated through. If you want the tops crispy, pop them in a toaster oven for a couple of minutes after microwaving. The melty chocolate chips will make your kitchen smell like heaven all over again.

FAQs

Can I use regular pudding instead of instant chocolate fudge pudding?

Instant pudding is preferred because it thickens the batter and adds that fudgy texture without extra moisture. Using regular pudding may result in a wetter batter and denser muffins, so instant is best for the authentic Costco Double Chocolate Muffins Recipe experience.

What size are jumbo muffin tins? Can I use regular muffin tins?

Jumbo muffin tins are larger than standard ones, usually about 6 to 7 ounces per cup. If you use regular muffin tins, your baking time will be shorter, around 15-18 minutes. Just keep an eye on them to avoid overbaking!

Is Greek yogurt necessary, or can I substitute it?

Greek yogurt adds moisture and a slight tang that balances the chocolate’s sweetness. You can substitute with sour cream or even plain yogurt, but Greek yogurt provides the richest texture and best flavor for this recipe.

Can I add nuts or other mix-ins?

Absolutely! Chopped walnuts or pecans add a lovely crunch that contrasts nicely with the soft muffins. You can also experiment with mini white chocolate chips or dried cherries for a different flavor twist.

Do these muffins need to be refrigerated?

No refrigeration is necessary if you plan to eat them within a few days. Just store them in an airtight container at room temperature. However, if your kitchen is particularly warm or humid, refrigeration can help keep them fresh longer.

Final Thoughts

There is nothing quite like the joy of biting into a rich, moist chocolate muffin that feels like a special treat you made just for yourself. The Costco Double Chocolate Muffins Recipe brings together simple ingredients in a way that yields consistently amazing results, whether for breakfast, dessert, or a sweet snack anytime. I can’t wait for you to try this recipe and discover how easy it is to bring a bit of chocolate bliss into your kitchen.