If you have ever found yourself craving a bakery-quality treat with deep, rich chocolate flavor and that perfect tender crumb, this Costco Chocolate Muffins Recipe is going to become your go-to baking delight. These jumbo-sized muffins capture the magic of the famous Costco bakery version, combining moist, chocolaty goodness with luscious chocolate chips throughout, making every bite a comfort-filled moment. Whether you’re baking for breakfast, dessert, or an anytime snack, these muffins deliver an irresistible balance of sweetness and texture that feels like a warm, chocolaty hug.

Costco Chocolate Muffins Recipe - Recipe Image

Ingredients You’ll Need

This recipe requires simple pantry staples that come together effortlessly to build layers of flavor and moisture. Each ingredient plays an essential role, from creating the rich chocolate base to ensuring the muffins stay fluffy and perfectly tender.

2 cups all-purpose flour: The backbone of the muffins, providing structure and a soft crumb.
1 cup granulated sugar: Adds sweetness and helps create a tender texture.
1/2 cup brown sugar (packed): Introduces moisture and a subtle caramel flavor that deepens the chocolate taste.
3/4 cup unsweetened cocoa powder: Gives the muffins that intense, rich chocolate foundation.
1 tablespoon baking powder: Ensures the muffins rise beautifully and stay light.
1/2 teaspoon baking soda: Works alongside baking powder for lift and perfect texture.
1/2 teaspoon salt: Balances sweetness and enhances all the chocolatey flavors.
2 large eggs: Binds ingredients and adds richness for a moist interior.
1 cup whole milk: Moisturizes the batter and contributes to a tender crumb.
1/2 cup sour cream: Adds moisture and a subtle tang to keep the muffins tender and flavorful.
1/2 cup vegetable oil: Ensures a soft, moist muffin without dryness.
1 tablespoon vanilla extract: Enhances the chocolate flavor with a sweet aroma.
1 1/2 cups semi-sweet chocolate chips (plus extra for topping): Create pockets of melty chocolate that make every bite heavenly.

How to Make Costco Chocolate Muffins Recipe

Step 1: Prepare Your Oven and Muffin Pan

Start by preheating your oven to 375°F (190°C), which is just the right temperature to bake these jumbo muffins to perfection. Line a jumbo muffin pan with paper liners or lightly grease each cup to prevent sticking, setting the stage for easy removal later.

Step 2: Combine Dry Ingredients

In a large bowl, whisk together the flour, granulated sugar, brown sugar, cocoa powder, baking powder, baking soda, and salt. This ensures the leavening agents and dry components are evenly distributed, which is crucial for achieving a consistent bake and texture.

Step 3: Mix Wet Ingredients Separately

In another bowl, beat the eggs until smooth, then whisk in the whole milk, sour cream, vegetable oil, and vanilla extract. This mixture will add moisture, richness, and flavor, helping balance out the dry ingredients.

Step 4: Combine Wet and Dry Ingredients

Pour the wet ingredients into the dry ingredients and stir gently just until combined. Avoid overmixing here to prevent tough muffins — you want a tender, delicate crumb. There might be a few lumps, and that’s completely fine.

Step 5: Fold in the Chocolate Chips

Gently fold in 1 1/2 cups of semi-sweet chocolate chips, distributing them evenly throughout the batter to make sure each muffin gets those amazing chocolate pockets.

Step 6: Fill Muffin Cups and Bake

Divide the batter evenly into the muffin cups, filling each about three-quarters full. Sprinkle extra chocolate chips on top for that irresistible chocolate-studded finish. Bake for 22 to 26 minutes until a toothpick inserted in the center comes out with moist crumbs but no wet batter.

Step 7: Cool and Enjoy

Let your muffins cool in the pan for 5 to 10 minutes before transferring to a wire rack. This resting time allows them to set perfectly without crumbling.

How to Serve Costco Chocolate Muffins Recipe

Garnishes

These muffins shine on their own, but a light dusting of powdered sugar or a drizzle of warm chocolate ganache can take them from wonderful to divine. You might also consider a simple spread of softened butter or cream cheese for added richness.

Side Dishes

Pair these muffins with a steaming cup of coffee, hot chocolate, or your favorite tea to complement their rich chocolate profile. Fresh fruit like raspberries or strawberries on the side adds a fresh, tart contrast that brightens the experience.

Creative Ways to Present

For a delightful treat at brunch or parties, serve the muffins slightly warm with a dollop of whipped cream and a sprinkle of chopped nuts or shredded coconut. Wrapping them individually in parchment and tying with twine makes a charming homemade gift that friends and family will adore.

Make Ahead and Storage

Storing Leftovers

Once cooled completely, store leftover Costco Chocolate Muffins in an airtight container at room temperature for up to three days. They remain moist and delicious but are best enjoyed fresh.

Freezing

These muffins freeze beautifully. Wrap each muffin individually in plastic wrap and place them in a freezer-safe bag or container. They will keep well for up to three months, allowing you to enjoy that bakery-quality taste anytime.

Reheating

To enjoy frozen muffins, thaw them at room temperature or warm them gently in the microwave for about 20 seconds. This brings back their soft, melty chocolate magic as if freshly baked.

FAQs

Can I make these muffins with whole wheat flour instead of all-purpose?

Yes, you can substitute whole wheat flour, but the texture will be denser and the flavor more robust. For best results, try using half whole wheat and half all-purpose flour to maintain tenderness while adding nuttiness.

What’s the best way to prevent the muffins from becoming dry?

Don’t overmix the batter, as this develops gluten and leads to toughness. Also, be careful not to overbake—they should come out with moist crumbs on a toothpick test, not wet batter.

Can I use dark chocolate chips instead of semi-sweet?

Absolutely! Dark chocolate chips will create a richer, slightly less sweet flavor that pairs beautifully with the cocoa powder. Adjust sugar slightly if you prefer a sweeter muffin.

How do I make smaller muffins instead of jumbo ones?

If using a standard muffin pan, fill cups about two-thirds full and reduce the baking time by 5 to 7 minutes, checking for doneness with a toothpick to avoid drying out.

Is there a way to make these muffins vegan?

You can swap eggs for flax or chia egg substitutes and use plant-based milk and sour cream alternatives, plus a vegan oil. Keep in mind, texture and taste might vary slightly, but they’ll still be delicious.

Final Thoughts

Sharing the Costco Chocolate Muffins Recipe feels like handing over a little bit of happiness wrapped in chocolatey goodness. Whether you’re making them for a special occasion or simply to brighten an ordinary day, these muffins promise rich flavor and a moist, tender bite that stays with you. So, turn on your oven, gather your ingredients, and treat yourself to these luscious muffins—you won’t regret it!

Costco Chocolate Muffins Recipe

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4 from 41 reviews

Author: admin
Total Time: 40 minutes
Yield: 6 jumbo muffins (or 12 standard muffins) 1x
Diet: Vegetarian

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Description

These Costco Chocolate Muffins are rich, moist, and packed with chocolate chips, making them perfect for breakfast or a decadent dessert. Featuring a tender crumb and intense cocoa flavor, this recipe yields jumbo bakery-style muffins that satisfy any chocolate lover’s craving.

Ingredients

Scale

Dry Ingredients

2 cups all-purpose flour
1 cup granulated sugar
1/2 cup brown sugar (packed)
3/4 cup unsweetened cocoa powder
1 tablespoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt

Wet Ingredients

2 large eggs
1 cup whole milk
1/2 cup sour cream
1/2 cup vegetable oil
1 tablespoon vanilla extract

Chocolate Chips

1 1/2 cups semi-sweet chocolate chips (plus extra for topping)

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Instructions

Preheat and Prepare Pan: Preheat the oven to 375°F (190°C). Line a jumbo muffin pan with paper liners or lightly grease each cup to ensure easy removal of muffins after baking.
Mix Dry Ingredients: In a large bowl, whisk together the all-purpose flour, granulated sugar, brown sugar, cocoa powder, baking powder, baking soda, and salt until well combined and uniform in color.
Combine Wet Ingredients: In a separate bowl, beat the eggs thoroughly. Then whisk in the whole milk, sour cream, vegetable oil, and vanilla extract until the mixture is smooth and well blended.
Combine Wet and Dry Mixtures: Pour the wet ingredients into the dry ingredients. Stir gently just until combined, being careful not to overmix to avoid tough muffins.
Fold in Chocolate Chips: Gently fold in 1 1/2 cups of semi-sweet chocolate chips evenly throughout the batter, ensuring a decadent chocolate experience in every bite.
Fill Muffin Cups: Divide the batter evenly among the muffin cups, filling each about 3/4 full to allow space for rising. Sprinkle extra chocolate chips on top for added texture and visual appeal.
Bake Muffins: Bake in the preheated oven for 22–26 minutes, or until a toothpick inserted into the center comes out with moist crumbs but no raw batter. Baking times may vary slightly depending on your oven.
Cool and Serve: Let the muffins cool in the pan for 5–10 minutes before transferring them to a wire rack to cool completely or serve warm.

Notes

Use a standard muffin pan to make 12 smaller muffins; reduce baking time by 5–7 minutes accordingly.
For extra moist muffins, allow the batter to rest for 10 minutes before baking.
These muffins freeze well—wrap each individually and store in the freezer for up to 3 months.

Prep Time: 15 minutes
Cook Time: 25 minutes
Category: Breakfast, Dessert
Method: Baking
Cuisine: American