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If you’ve ever wandered through Costco and given in to that giant clamshell of double chocolate muffins, you know how dangerous they are.  My kids beg for them and of course we cant say no!

 

Rich, moist, full of melty chocolate chips, and basically the size of your head, what’s not to love? Well, now you can skip the trip and make these right in your own kitchen.

These Costco-style double chocolate muffins are just as big, chocolatey, and indulgent as the ones from the store, but better because they’re homemade (and you know exactly what’s going in them), which I love!

This is one of those recipes I make almost weekly. It’s so simple to throw together, and the muffins keep great for breakfast, after-school snacks, or late-night chocolate cravings. The base is made with devil’s food cake mix and chocolate pudding for that extra rich texture, and a little cinnamon gives them that true Costco flavor. I love using jumbo muffin tins for that authentic bakery look, but you can absolutely make them regular size or even mini for lunchboxes.

These are honestly perfect for make-ahead breakfasts, bake sales, or freezer-friendly treats, and they’re always a hit with kids, husbands, and literally anyone!

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Why You’ll Love This Recipe

• It’s better than the store-bought version – Seriously, the flavor and texture are spot on.

• Big batch = big payoff – Make a dozen jumbo muffins with one bowl and one bake.

• Great for freezing – These muffins hold up beautifully in the freezer.

• Customizable – You can swap the chocolate mix, change up the chips, or even leave out the cinnamon if you want.

Ingredients

• 3 eggs: Help give structure and moisture to these big bakery-style muffins.

• ½ cup oil: Keeps the muffins rich and tender with that soft, moist crumb we love.

• ½ cup milk: Adds creaminess and balances the batter, any milk works here.

• ¼ cup water: Just a bit of added moisture to loosen the batter perfectly.

• 1 teaspoon vanilla: Adds a warm, cozy flavor that ties everything together.

• 1 cup plain Greek yogurt: Keeps these muffins dense and moist while adding a little protein punch. I always look for ways to sneak a little protein into my kids diet. 

• 1 (15.25 oz) Devil’s food cake mix: The chocolatey base that makes this so easy, all the ingredients are already measured for you!

• 1 (3.9 oz) package instant chocolate fudge pudding mix: Gives the muffins that rich, moist texture you can’t get from scratch alone.

• ½ teaspoon cinnamon: The secret ingredient, adds depth and warmth that makes these taste just like Costco’s.

• 2½ cups semisweet chocolate chips (divided): Because double chocolate = double the chips. Stir some in and sprinkle more on top for that bakery look.

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Ingredient Substitutions

• Use regular chocolate pudding mix if you can’t find fudge

• Swap in sour cream if you don’t have Greek yogurt

• Leave out the cinnamon if you’re not a fan—but it’s what gives that Costco flavor!

• You can use regular or mini muffin tins, just reduce the bake time accordingly

Pro Tips for Bakery-Style Muffins at Home

• Don’t overmix the batter—just stir until combined to keep them light and tender.

• Use a jumbo muffin tin and fill each cavity almost to the top to get that tall bakery dome.

• For extra melty chocolate pools, push a few chocolate chips into the tops of each muffin right before baking.

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How to Make Costco Double Chocolate Muffins

1. Preheat your oven to 375°F and line a jumbo muffin tin with liners.

2. In a large mixing bowl, beat together the eggs, oil, milk, water, and vanilla until smooth.

3. Add in the Greek yogurt and mix until fully incorporated.

4. Using a spoon or spatula, stir in the cake mix, dry pudding mix, and cinnamon until just combined.

5. Fold in 2 cups of the chocolate chips.

6. Divide the batter evenly between your muffin cups and top with the remaining ½ cup of chocolate chips.

7. Bake for 20 to 25 minutes, or until a toothpick inserted in the center comes out clean.

8. Let cool slightly and enjoy warm, or store for later!

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FAQs

Can I make these with regular muffin tins?
Absolutely! Just reduce the bake time to around 15–18 minutes and keep an eye on them.

Do these freeze well?
Yes! Wrap each muffin tightly in plastic wrap and store in a freezer bag. Reheat in the microwave or let thaw overnight.

Do I have to use the cinnamon?
Technically no, but it’s that little extra something that gives them that true Costco flavor. It’s subtle but worth it!

Can I make these with a different cake mix?
Sure! Any chocolate cake mix works, though devil’s food gives the best rich flavor.

Can I Add Anything to These Muffins?

Yes! If you want to switch things up, try adding:

• Chopped walnuts or pecans for crunch

• Mini marshmallows for a brownie-like twist

• A sprinkle of sea salt on top before baking for a salty-sweet vibe

• A few teaspoons of espresso powder to deepen the chocolate flavor

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Serving Ideas

• Serve warm for breakfast with coffee or milk

• Pack in school lunches or snack boxes

• Top with whipped cream or ice cream for dessert

• Slice and toast halves with butter for an indulgent twist

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Storage Tips

• Store in an airtight container at room temp for up to 3 days

• Refrigerate to keep them fresh a bit longer

• Freeze for up to 2 months—just reheat before serving

These muffins are also one of my favorite make-ahead freezer snacks. I bake them on a Sunday, cool completely, then wrap them individually in plastic wrap and freeze. Then I just toss one into a lunchbox or zap it in the microwave for a quick breakfast.

They’re also a great homemade gift idea! Wrap a few in a cellophane bag with a cute tag for teachers, neighbors, or new moms who need a chocolatey pick-me-up.

 

Did you make these COSTCO DOUBLE CHOCOLATE MUFFINS, tell me how you liked it in the comments! For more delicious family friendly recipes you can follow me on PINTEREST, INSTAGRAM OR FACEBOOK 

Looking for some more chocolaty recipes? Check these out – 

• Chocolate Mint Icebox Cake
• Giant Chewy Chocolate Chip Pecan Cookies
• Peanut Butter Cup Icebox Cake
• Cosmic Brownie Cheesecake
• Hostess Cupcakes Cookies
• Chocolate Oreo Lush